xkaper said:
What does this have to do with an X3 chip?
If he wants to backup (his own) games to his hdd, or play (opensource etc) roms then he'll be wanting an X3 and a bigger hdd installed in his xbox!
If your xbox is already modded then you'll need to look on xbox-scene, go to the tutorials section and there should be one to explain to you how to network two xbox's.
Basically you'll need a crossover network cable (if you're connecting them directly to each other) or a straight network cable (if you're using a router/hub)!
Hook them up and use a file manager to so you can see the contents of one xbox on the other!
Another good place to look would be the avalaunch forums, as they'll have specific instructions for their dashboard (assuming you use avalaunch that is!)
Xbox scene might be a better place to ask this, but if you get very stuck pm me and i'll try my best to explian in detail!