I am in the process of divesting myself of my Xbox 360. However, I have a bunch of music DLC for Rock Band associated with my Live account that I sort of feel would be going to waste. My greatest pain in selling the Xbox is my fear that these purchases are essentially gone now. Can I somehow give the account to a friend who is getting in to Rock Band? Also, how can I clean my hardware of my presence on it? I should probably do such before I sell the Xbox?