hmm, ultimate xbox newbies guide, 3rd post from the top.
Key terms in that post:
Networking Xbox to PC
EvolutionX
Burning Xbox Games
When you get to the part after you copy the game to your PC, Just send it back to the "E" directory in a folder. Or, u can send a program called DVD2Xbox or boXplorer and copy the game directly off your game disk.
If you don't want to read that ultimate xbox newbies guide, you can get a shorter version that doesn't explain the history of everything in
this other sticky
ps: transfering roms is the same way as transfering games, except u need an emulator for the game and u have to put the roms in a specific folder (which the emulator gives)