I am not sure that it is not so hard to port a game from Xbox.. Games from PS2 can be played (even metal Gear Solid 3) but I know only about 2 emulators of XBOX..It is CxbX and Xeon...But only one game is supported now, and it is Halo, which was long time ago allready ported to PC. So you MUST buy Xbox to play Munch. I also will buy Xbox 360 . But there is another thing you should know now. When you have X360 then you MUST install an update to Xbox 360 (pure Microsoft ;p)
here is the link to the update with instructions
http://www.xbox.com/en-US/games/back...patibility.htm