Re: Reisntalling Windows XP the original product key isn't accepted
On your original xpCD there is a file within I386 directory called winnt.sif (used for unattended setups). Open this file with notepad and look for the product key section. If it is readable and not encrypted, note this down and use it for your installation. You may find this is different to the CoA that dell stuck to you machine and you may find that this works for you. If you view winnt.sif from your nlite versions, the product key will be what ever you entered into nlite and not necessarily that from the original xp cd.
Hope this helps