Thanks for writing, Ed. I must disagree with you. I checked before buying it, and according to this link, Win98se qualifies for an upgrade, for both the home and professional versions:
http://www.microsoft.com/windowsxp/pro/howtobuy/upgrading/matrix.asp---Michael
>If you're trying to upgrade to Win XP Pro, Win9x is not a qualifying operating system; it is a qualifying OS for XP Home. Unfortunately, that limits use in business domain environments.