I'm sorry, but I don't think bungie will allow you to create another group, and I beleive you are not valid for this tournament because:
1. you don't have live
2. you don't have halo 3
3. you don't even have a 360!
unless of course that all changed after you moved, but I'm pretty sure your not the kind of guy to spend your money on all that when you could spend it on your pc