The good fellas at spaceforce 2 have released some work in progress alphas of their map editor and materials editors. So far there rather cool and functional. So if you wana mod the game more than usual give em a try.
http://www.spaceforce2.com/forum/forum_posts.asp?TID=1986&FID=1&PR=3
Link to the download at their forums.
http://www.spaceforce2.com/forum/forum_posts.asp?TID=1986&FID=1&PR=3
Link to the download at their forums.