|There is a product key in a file named unattend.txt, but it's generic. It's NOT the key that was used to install XP originally on your system. If you're trying to do a repair install, it's useless - you need "your" key.|
The key from the disk can be used to do a clean install of XP, but XP will NOT activate unless the key is changed. So either way, you will need the "legal" key that belongs to your system.