Confirmation ID

Microsoft will allow you to reinstall XP on the same hardware as often as needed.

If you are installing XP on new or different hardware, you just have to confirm to Microsoft that you do not have XP installed on another PC.

I don't know the specific time frame, but the activation resets after a period of time allowing you to reinstall XP and use automatic activation.

If it has been too short a time since you last reinstalled XP, you need to call the activation center and manually activate XP.

Chas

The Product ID is supplied on the back of the packaging for the XP CD (if its a retail version). Its a Yellow Sticker with a Key picture and PRODUCT KEY followed by a long number and a bar code underneath. For OEM check elsewhere, depending on supplier.

Never throw packaging away!

Follow this link to download a program that will retreive your CD Key. This is not an illegal work around to install XP, it just retreives the current key on your system.
http://www.magicaljellybean.com/keyfinder.shtml

I am also looking for the same thing but found nothing :(
http://www.gazeboentertainment.com