Can you connect a Retail Xbox to a Modded Xbox. My friend and I want to play Halo with 2 Xboxes and 2 tv's. I have a modded Xbox(Executor 2.2 lite and EvoX) and he has a retail Xbox. Do we connect the same way as before.

Also do we need 2 copies of Halo or can I use the backup on my hard drive and he use my actual game?

People bring their xbox's to my house for LANs, and I play off my harddrive...works fine for me. I play off my harddrive for XBC also.