A friend of mine corrupted their XBL account whilst using it on a USB stick. Unfortunately he created the account years ago and doesn't remember any details of the account i.e. the email address and password, therefore he cannot recover the account.
What can he do to get his account back? He has considered making a new account but he still has half a years gold (as well as the many save games associated) on the account and doesn't want it to go to waste. There MUST be a way of changing the email address associated with the account or maybe even just reminding him of the emal address so he can try his usual passwords.