How do you use the associated graphics when someone has modified terrain images? The game does not seem to recognize the whole file, which is usually a block of x number of modifications for standard and specials all in one file...

I tried going into a paint program and carefully clipping each individual graphic, but the program said they weren't the right size...

Is there some kind of utility for this or something?

However, you might want to post this question in the Civ Creation Forum.
There are a lot of people there who know how to do all kinds of stuff to the game.

Good luck and Keep on Civin'