Mech 1 should be an arcade game for 1200-800 msp sold in the Xbox Live Market Place...
I think that would be better than making mech 1 backwards compatible all you would need is all the Mechs, Destruction, Team D, Capture The Flag, Not It, wall walking, and all the maps... No single player just all online.... Seems to me like an easy way to make money off the game again and you wouldn't even have to leave your xbox to go buy it...