strategyonly
C2C Supreme Commander
There is a file called C2C_Terrain_Addons_CIV4GameText.xml in all versions from v21 (the earliest I have) through the current v29. It was initially getting smaller but then starts getting bigger again after v25 (more space related stuff, plus some early buildings too).
I see no Python file with a similar name anywhere back to v21. Based on the text keys in the file, I'm not sure what would be in such a python file.
It was made by DH, and it also made regular maps made just like mapscript ones. Adding all the terrain and resources etc to it, but it was only done one or two times and then DH got rid of it, and then he also deleted it from all of his filex also, but its a GREAT tool and needs to be re-done.