1. The OEM recovery CD from most manufacturers will not allow the recovery to proceed if it detects that the machine it's restoring to is not made by the manufacturer of the CD. (e.g. Using a Dell recovery CD generally won't work if the machine isn't a Dell).
2. It is not legal to move an OEM installation of Windows from one machine to another, no matter if you get it to work or not.
3. If you can pick up a legit copy of XP for $5, you should run out and buy like 5 copies just to have.