Well I'm sure it could be done seeing Xbox games mimics the PC version. And since Xbox/PS2 games are DVD's, All you would need is a DVD burner and an ISO file format of the game itself...I think you could only do it on Xbox game.
Nintendo are smart people if not greedy, They let the Wii come out at Christmas and let them trickle out of warehouses, anounce all good games out in June and so everyone buys one beforehand because they say "all the good games come out later and then they will sold out" but then cut them all back to the next Christmas its all a scam