Was given a "used" XP Pro (no svc pack) to use to get my comp up and running after having to replace the C hard drive. Need XP w/SP2 so I can format a SATA 250g drive with no partitions - apparently it takes SP2 to do that. Bought XP Home SP2 (like I had on before the crash - had lost the key, of course) and I think I'm ready to install it. I've got everything transferred to another physical drive, all the stuff on the desktop, the Firefox browser & bookmarks, all the Program Files with all my security & video stuff - anything else to do? NOW - do I have to reformat that hard drive to install the new XP, or can I do a Repair type install "over" the existing XP Pro? If I can, exactly how do I get started? Thanks!!