Changing the account the app market uses
How do you change the account that the app market uses? I got the phone from my dad who hasn't used in a year and a half, and his gmail account is still there and I don't have the password. I tried removing the account but the droid says:
"This account is required by some applications. You can only remove it by resetting the phone to factory defaults..."
Original gmail account invalid
Question: the original gmail account doesn't seem to exist anymore. On the Droid, it keeps showing those crazy characters; on the PC, it just says that it can't find that account. Hopefully, a factory reset is not the only option!