I have Windows XP (full version) on my computer. My wife's computer has Windows 98 and I want to upgrade it to XP, I've been looking at the Upgrade version. I want to do a fresh install because I'm getting her a Wester Digital 120 GB Sata drive and want to do a clean install. Is that possible with an upgrade version since it says it checks for the software first? Does that mean I have to install Win 98, then do XP?