I played black arrow on xlink fine about a week ago. But since installing the user maps via the map manager program, I can't play it at all. When I go to start the game all I get is the initial loading screen. The bar gets about 3/4 of the way across the screen, and then it locks my entire xbox. I cant in game reset, so I have to turn it off and back on. Do you guys have any suggestions about what I can do?

What maps did you install? If its maps for the old rainbow they wont load. But if its Village and/or Assault Pack 1 it might be because BA is scanning that its YOUR content, and not someone elses, but im not sure...