thanks, welcome to the board. This is good information to know.
Note that this is only for the business editions. Most of the retail computers purchased at best buy ect. have home versions, which are not eligible for upgrade.
If you have a dell, try this site for a $20.00 XP disk
http://www.pacificgeek.com/product.asp?ID=63410&C=283&S=-1most of the drivers are online. This will only work for a dell.