Right, so its a DC you are restoring, would that be a authoritative or non-authoritative restore (do you want AD to be replicated or not) > you cant use the BE (backup exec) service account because it doesnt exist ie. AD is empty at the moment, you have to either a) use the computers special account (system account) or the dir. service administrator account.
So let me get this straight, you were backing up TO the XP's hardrive by putting the backup-to-disk folder on there, and backup exec was installed locally on the server you are trying to restore ? If I am correct, in teh backup selections list, you should be able to click on that share > network (doing this a bit from memory) > reset defualt attach info >> force BE to attach as a user on the XP box that has admin rights. Should get round any rights issue you have
Hope my understanding is correct
Cheers
Dog