I discovered this Age of empires II mod the other day and it's fantastic!
5 new civs and tons of new techs, units, buildings and set pieces.
It also updates the game for windows 7, so for me, no more discoloration.
It also seems to update graphics a bit and doesn't require The Conquerors to be in the disc drive.
*requires AOE2 and The Conquerors to be installed.