I have finally managed to get duke 3d working on my xbox and thought maybe you would be interested. To be perfectly honest i think its great on the TV (Fullscreen) and the controls are mapped wisely.
I cant provide a link as XDK programs are illegal.
I think this version should be legal as you need the .grp file to be able to play the game (atomic version).
How can you do that????? I would appreciate if you told me how! cause i only have 1 cable 4 the two xbox's to hook up together but can you tell me how??