A bit off-topic, but a lot of stuff in this thread is allready so...
Are you actually modding Civ4 now? Is it simpler than Civ3 or more complicated (do you really need to learn python and programming?)
Is it possible to mod it so it looks kinda like Civ3, freeze the angles you look at the terrain, make the terrain like Civ3 etc? Then it would perhaps be possible to use Civ3 units aswell?
Oh, and I love the drawings of the fictive americans!