Ok I wont lie here is my situation I installed DEVILS OWN windows XP. Now sp1 is out and I want to install and i know you can do the key gen thing etc,etc but for the first time I enjoy a O.S . I think windows XP is the first Stable o.s i got to use and I enjoy it a lot. I decided I dont want to format etc,etc and install a fresh legal copy so here is what I want to do. Will the following work. 1. BUY A LEGAL OEM VERSION OF XP PRO 2. Use key gen to change my serial to that of the legal OEM 3. INSTALL XP SP1 I have to say microsoft did a good job with XP and i will consider buying more of there future opperating systems if there as good as XP if not better.