This process works for both scenarios and for the standard game, for the standard game all the files should be in [CtP2 folder]\ctp2_data\[name of path I mention] and for scenarios it should be [CtP2 folder]\Scenarios\[name of Scenario Pack]\[(optionally) scenXXXX where XXXX is any number between 0000 and 9999]\[name of path I mention]. Whenever I mention the folder english, this will only work for the English version of the game. When German/French/whatever versions come out, simply replace the foldername english with german/french/whatever to make it work for those versions.

Keep in mind that I don't have the final product yet so the names of things might be slightly different but in general everything should work. Presuming you have all the sprites and graphics that you need/want (if you don't, check the CtPI modification section to find out how to make those or use the list in the CTPII modification section to find out what sprites there were for CtPI and rename them to CtPII style (add an extra 0 if needed and use a non-existing number instead of the old one so you can stll use existing sprites whenever needed)):

1) Place the sprites in default\graphics\sprites.

2) Place any tga's you may have in default\graphics\pictures (make sure they are 16-bit). I don't think it matters what name they have, but these names are used in step 4, so make sure the names correspond with the ones you use in step 4.

3) Place any sound files you may have (WAV format) in the default\sounds.

4) Edit default\gamedata\newsprite.txt. FE if you have a Chariot unit with the filename of the sprite Cu100.spr, add the line UNIT_CHARIOT2 100. Both the UNIT-name and the number need to be unique and the number must be the same as the number in the filename of the sprite.

5) Edit default\gamedata\uniticon.txt. For my Chariot example it might look like this (I copied this from the CtPII Cannon unit):

ICON_UNIT_CHARIOT { FirstFrame "UPUP100L.TGA" Movie "NULL" Gameplay "UNIT_CHARIOT_GAMEPLAY" Historical "UNIT_CHARIOT_HISTORICAL" Prereq "UNIT_CHARIOT_PREREQ" Vari "UNIT_CHARIOT_STATISTICS" Icon "UPUP100A.TGA" LargeIcon "UPUP100L.TGA" SmallIcon "UPUP100B.TGA" StatText "UNIT_CHARIOT_SUMMARY" }

If you don't have all necessary graphics, it's best to re-use the graphics of an existing unit.

6) Edit default\gamedata\sounds.txt. If you don't have any sounds simply copy the entries of an existing unit or use NULL.WAV (no sound), else add you're own. The various entries you need are all over the file, but here are the ones you might use for the Chariot example (once again, copied from the Cannon entry):

SOUND_ACKNOWLEDGE_CHARIOT "GUV100.WAV"
SOUND_ATTACK_CHARIOT "ACHARIOT2.WAV"
SOUND_CANTMOVE_CHARIOT "GUV100.WAV"
SOUND_DEATH_CHARIOT "VCHARIOT.WAV"
SOUND_MOVE_CHARIOT "WCHARIOT.WAV"
SOUND_SELECT1_CHARIOT "GUV100.WAV"
SOUND_SELECT2_CHARIOT "GUV100B.WAV"
SOUND_SPECIAL_CHARIOT "NULL.WAV"
SOUND_VICTORY_CHARIOT "NULL.WAV"
SOUND_WORK_CHARIOT "NULL.WAV"

For 'special' Situations you might have extra special sounds. You can add those easily, just give them a name here (FE SOUND_CHARGE_CHARIOT) and use that name where ever you need it in the rest of the files (i.e. normally only Units.txt).

7) Nown add the appriopriate texts to english\gamedata\Great_Library.txt. Example:

Requires:

[UNIT_CHARIOT_STATISTICS]
Attack: {UnitDB(UnitRecord[0]).Attack / 100}
Ranged: {UnitDB(UnitRecord[0]).ZBRangeAttack}
Defense: {UnitDB(UnitRecord[0]).Defense / 100}
Armor: {UnitDB(UnitRecord[0]).Armor / 100}
Damage: {UnitDB(UnitRecord[0]).Firepower}
Vision: {UnitDB(UnitRecord[0]).VisionRange}
Movement: {UnitDB(UnitRecord[0]).MaxMovePoints / 10000}
[END]

[UNIT_CHARIOT_SUMMARY]
Ancient Flanking Unit
[END]

[UNIT_CHARIOT_GAMEPLAY]
Due to it's large attack factor the Chariot is one of the most formidable Ancient attack units and, though slower, only surpassed by the War Elephant. Also, it's a flanking unit so it can provide support to other units during combat.
[END]

[UNIT_CANNON_HISTORICAL]
The Chariot was one of the most important Cavalry units of the Ancient Age.
[END]

8) Add an entry to default\gamedata\Units.txt. It might look like this:

## UNIT 100
UNIT_CHARIOT {
Description DESCRIPTION_UNIT_CHARIOT
DefaultIcon ICON_UNIT_CHARIOT
DefaultSprite SPRITE_CHARIOT
Category UNIT_CATEGORY_FLANKER
Attack 20
Defense 10
ZBRangeAttack 0
Firepower 2
Armor 1
MaxHP 10
ShieldCost 500
PowerPoints 400
ShieldHunger 6
FoodHunger 0
MaxMovePoints 300
VisionRange 2
EnableAdvance ADVANCE_THE_WHEEL
ObsoleteAdvance ADVANCE_FEUDALISM
ActiveDefenseRange 0
LossMoveToDmgNone
MaxFuel 0
CanEntrench
CanExpel
CanPillage
CanPirate
ExertsMartialLaw
DeathEffectsHappy
IsFlanker
SoundSelect1 SOUND_SELECT1_CHARIOT
SoundSelect2 SOUND_SELECT2_CHARIOT
SoundMove SOUND_MOVE_CHARIOT
SoundAcknowledge SOUND_ACKNOWLEDGE_CHARIOT
SoundCantMove SOUND_CANTMOVE_CHARIOT
SoundAttack SOUND_ATTACK_CHARIOT
SoundWork SOUND_WORK_CHARIOT
SoundVictory SOUND_VICTORY_CHARIOT
SoundDeath SOUND_DEATH_CHARIOT
CanAttack: Land
CanSee: Standard
MovementType: Land
Size: Medium
VisionClass: Standard
CanReform {
Sound SOUND_ID_REFORM_CITY
Effect SPECEFFECT_REFORMCITY
}
}

############################################################

9) Edit english\gamedata\gl_str.txt to give the unit a name for in the game. For the Chariot it would look like this: UNIT_CHARIOT "Chariot".

10) Now start up the game and test if it works. If it does and if you're happy with the stats and everything, you only have to get the AI to use the unit.

11) This can be done by adding it in the build lists, in the file default\gamedata\UnitBuildLists.txt. Just insert it at the correct position in the correct buildlist(s). Unless I'm mistaken the AI will see the units further down the list as more advanced, so in case of the Chariot it might look like this:

UNIT_BUILD_LIST_OFFENSE {
Unit UNIT_WARRIOR
Unit UNIT_SWORDSMAN
Unit UNIT_CHARIOT
Unit UNIT_KNIGHT
Unit UNIT_CAVALRY
Unit UNIT_MARINE
Unit UNIT_FASCIST
Unit UNIT_MACHINE_GUNNER
Unit UNIT_PARATROOPER
Unit UNIT_WAR_WALKER
Unit UNIT_FUSION_TANK
Unit UNIT_CRUISE_MISSILE
}

I have found out a few things working with inserting units from ctp1:
1)The sound files for Attack, Move and Death are included in Ctp2, but not the other sounds, apparently.
You need to go into the Ctp1 sounds.txt, and copy the appropriate lines into your Ctp2 scenario sounds.txt.
If you wanted to use other types of sounds from Ctp1, you could copy the sound files into your scenario as well, but the most important ones are already in there.
2)The tgas for the Ctp1 units are apparently NOT in Ctp2, or they have different names if they are. We need to get one of the Activisioners to explain this for us. This is bad because the Ctp1 tgas are all in one enormous file in the Ctp1 pictures folder, which can't be opened by standard programs, as far as I know.
3)Tga sizes are different for the small icon pics in Ctp2. The large icons from the Ctp1 units will work fine. The small pics for Ctp2 have the same size ratios as the large pics, so you can simply take the large pics, and resize them to the appropriate sizes. The size of the "a" pic is 32x24, and that of the "b" pic is 24x18. (That of the large pic is 160x120.)
4)I finally figured out the relationship between spriteID and newsprite. Basically, newsprite trumps spriteID. This means if both files have the same unit listed, the game will use the sprite number listed in newsprite.
Also, their are two sets of sprites in the game. One set is labeled GU08, for example, and the other GU008. The first set is the Ctp1 sprites, and the second set the Ctp2 sprites. Like the sprite files, the second set trumps the first set. Thus, if newsprite refers to a sprite 8, the game looks in the sprites folder for GU08, which MUST be there. Then, the game checks for GU008. If it finds a GU008, then it uses this sprite in the game rather than GU08.
To use one of the included Ctp1 sprites in the game, you need to copy the sprite out of the standard folder and place it into your scenario folder. There, you need to either:
1)re-name it to the Ctp2-system name that you choose (with a zero in front) if you wanted it to replace a ctp2 sprite, or
2)re-name it to an unused sprite number, using the Ctp1 system. (Note that GU28 cannot be used, since there is a Ctp2 sprite of an Artillery piece named GU028 that was not used in the game. This sprite may be used for mods, however.)

I was curious what I was pointing to when I copied the line that reads

Description DESCRIPTION_UNIT_WARRIOR

So I did a search on DESCRIPTION_UNIT_WARRIOR

That string shows up in units.txt, units_historical.txt, units_release.txt and junk_str.txt. But in everycase it seems that the string is something that is being pointed to, not something that is defined. So I'm still curious as to what it does, if anyone knows?

I went to Units_release.txt to find the string. What I found instead made me wonder what this file is. Here's what I found in Units_release.txt. It looks like an whole 'nother definition of the unit similar to units.txt

UNIT_WARRIOR {
SHIELD_COST 135
POWER_POINTS 100
MAX_HP 10
ATTACK 10
DEFENSE 10
FIREPOWER 2
ZB_RANGE_ATTACK 0

BATTLEFIELD_RANGE 1
BATTLEFIELD_RADIUS 1

VISION_RANGE 2

ACTIVE_DEFENSE_RANGE 0
ELECTRONIC_COMBAT_FACTOR 0

MAX_MOVEMENT 100
FUEL 0

SHIELD_HUNGER 4.05
FOOD_HUNGER 0

DEFAULT_SPRITE SPRITE_WARRIOR
DEFAULT_ICON ICON_UNIT_WARRIOR
DESCRIPTION DESCRIPTION_UNIT_WARRIOR
# #id string of the default sprite

SOUND_SELECT1 SOUND_SELECT1_WARRIOR
SOUND_SELECT2 SOUND_SELECT2_WARRIOR
SOUND_MOVE SOUND_MOVE_WARRIOR
SOUND_ACKNOWLEDGE SOUND_ACKNOWLEDGE_WARRIOR
SOUND_CANTMOVE SOUND_CANTMOVE_WARRIOR
SOUND_ATTACK SOUND_ATTACK_WARRIOR
SOUND_WORK SOUND_WORK_WARRIOR
SOUND_VICTORY SOUND_VICTORY_WARRIOR
SOUND_DEATH SOUND_DEATH_WARRIOR
ENABLING_ADVANCE ADVANCE_TOOLMAKING
OBSOLETE_ADVANCE ADVANCE_BUREAUCRACY
OBSOLETE_ADVANCE ADVANCE_NATIONALISM
############## special flags #############################
MOVEMENT_TYPE_LAND
MOVEMENT_TYPE_MOUNTAIN
LOSS_MOVE_TO_DMG_NONE
SIZE_SMALL

VISIBILITY_CLASS_0

VISIBILITY_CAN_SEE_0

EXERTS_MARTIAL_LAW

CAN_EXPEL_POP
DEATH_EFFECTS_HAPPY
CAN_REFORM SOUND_ID_REFORM_CITY SPECEFFECT_REFORMCITY
CAN_PILLAGE
CAN_EXPEL
CAN_PIRATE

CHEAT_INDEX 1
}

Attack
Defense
ZBRangeAttack
Firepower

and so forth...

I get the same error messages when I also try to add a government, only I get the error message in the govern.txt.

Here is the govern.txt I added for a new government 'Caliphate' I did not fiddle with the numbers, as I wanted to see if I could get the government into the game first.

This was added at the end of the govern.txt file

############################################################

GOVERNMENT_CALIPHATE {
Icon ICON_GOV_MONARCHY
EnableAdvance ADVANCE_CALIPHATE
Rank 2
SameRankAdvice GOVERNMENT_MONARCHY_SAME_RANK_ADVICE
HigherRankAdvice GOVERNMENT_MONARCHY_HIGHER_RANK_ADVICE
RationsExpectation 0
PositiveRationsCoef 1
NegativeRationsCoef 1
WorkdayExpectation 0
PositiveWorkdayCoef 1
NegativeWorkdayCoef 1
WagesExpectation 0
PositiveWagesCoef 1
NegativeWagesCoef 1
FoodCoef 1
ProductionCoef 1.3
InfrastructureCoefficient 0.5
CrimeCoef 0.75
CrimeOffset 95
KnowledgeCoef 1.25
MaxScienceRate 0.6
GoldCoef 1
CapitalizationCoefficient 0.5
UnitRushModifier 5
BuildingRushModifier 4
WonderRushModifier 7
EndGameRushModifier 7
MaxIncomingTrade 100000
MaxOutgoingTrade 100000
PollutionCoef 1.15
PollutionUnhappyCoef 0.02
SupportCoef 0.75
TurnsToNewReadiness 7
ReadyPeaceCoef 0.5
ReadyPeaceHP 0.5
ReadyAlertCoef 0.75
ReadyAlertHP 0.8
ReadyWarCoef 1
ReadyWarHP 1
DefenseCoef 1.5
WarDiscontentMaxUnits 15
WarDiscontentPerUnit 0.5
ConquestDistress -5
ConquestDistressDecay 0.2
OverseasCoef 0
OverseasDefeatDecay 0
OverseasDefeatCoef 1
HomeDefeatDecay 0.5
HomeDefeatCoef 1
MaxMartialLawUnits 2
MartialLawEffect 2
MartialLawThreshold 80
AtHomeRadius 2
EmpireDistanceScale 0.001
MinEmpireDistance 500
MaxEmpireDistance 2000
TooManyCitiesThreshold 35
TooManyCitiesCoefficient 1
ProfessionalUnits 0
GrowthRank 2
ProductionRank 4
CommerceRank 2
ScienceRank 2
GoldRank 2
MilitaryRank 5
PollutionRank 2
LoyaltyRank 5
MartialLawRank 3
}

############################################################

I also went through and edited all the other files that have been instructed to edit in earlier posts.

When all the files are added to the scenario directory I created, I tried to launch the game, and get the error messages, starting with the following

govern.txt 371 expected string ID

followed by the following box(es)

govern.txt 371 warning: required field positive workday Coef missing

and so forth.

None of the earlier posts for adding and editing governments/units have mentioned making changes in the ldl.str file. What exactly needs to be edited/added in that file - in relation to additions to governments and further down the line, new units?

I believe that the second, fifth and sixth line in the below sequence needs to remain unchanged from your template, as changing the entries from MONARCHY to CALIPHATE will cause crashs, and those lines need to be able to link up with other entries. If this is wrong, feel free to correct me on this. (I am sure of the second line, at least, as I do not have an icon for Caliphate)

GOVERNMENT_CALIPHATE {
Icon ICON_GOV_MONARCHY
EnableAdvance ADVANCE_CALIPHATE
Rank 2
SameRankAdvice GOVERNMENT_MONARCHY_SAME_RANK_ADVICE
HigherRankAdvice GOVERNMENT_MONARCHY_HIGHER_RANK_ADVICE

BTW, what do the following lines signify?
SameRankAdvice GOVERNMENT_MONARCHY_SAME_RANK_ADVICE
HigherRankAdvice GOVERNMENT_MONARCHY_HIGHER_RANK_ADVICE

I made my changes to Fascism too.

The game launched without crashing.

Now for the other 10%. I made changes in the Great Library file too, but what I get in the entries is a entry for 'Caliphate with a combination of information for 'Caliphate' and 'Monarchy' For example, I had written a history file for Caliphate, but it is not showing up - rather the history for Monarchy is there instead. Is there a line of text that will link up the Monarchy history instead of the Caliphate history.

And now, what I am curious about are the ranking numbers that are at the end of each government entry in the govern.txt file.

GrowthRank 2
ProductionRank 4
CommerceRank 2
ScienceRank 2
GoldRank 2
MilitaryRank 5
PollutionRank 2
LoyaltyRank 5
MartialLawRank 3

Exactly what do these numbers do, and how do they work. I'm assuming they are the rating system that is used to compare different governments. Do these need to be changed too?

I know this is somewhat off-topic to this thread about adding a unit, but the issues are related in the sense that in the .txt files, there may be lines of text that need to be left alone. So far, the instructions have been pretty straightforward, but if there are lines that need to be left alone, I hope it will be spelled out in the info provided.

I also have a starting point to now go into the unit.txt files and see where the problem is at there for my add-on unit. Are there any entries within those files that need to be left alone? Or are there any entries that require an unusual alteration?

The rank numbers are used for the government comparison. You should change those numbers if you want to get accurate comparisons to other governments.