Hmm... I heard that you can import creature models from Spore... I even saw instructions on how to do it, but... when I tried to do it, it didn't work for me (or rather, it worked, but only halfway – without textures). As an option, I can later experiment with this again and try to create something (hopefully, it will turn out well).
Now, for the news, I tried to test a mod with 3 factions on my favorite huge map, and the game crashed. Practice shows that the more my mod replaces, the higher the chance that the huge map won't launch:( it might be due to a weak computer; I don't know for sure, so all subsequent races will be released as separate, independent mods so that you can play as just one or a few factions