The copy I have indicates it will work in all MS Operating Systems -95, 98, ME, 2000, and XP. XP has the ability to open many 98 and early ME programs that even 2000 won't, and if it's good for 2000, it'll work on XP. The drivers are both set up for NT partition there, and thus essentially the same.
If you look closely at the larger image bottom of the link posted above it appears the CD is copyrighted 2003 or 2005, can't quite make the last number out there, but definitely after 2000, in which case I wouldn't have any reservations about it running on XP.
Actually a very nifty program, has loads of good info, you can elect motor type... L-Head, OHV, V-Twin, 180* Opposed Twin, search by model number, look up by part name, use the menu to move directly to chapters within the manual, etc. etc. The only drawback I've found is it locks you in the program when open, so you can't copy and paste info like I did above! Well... at least most folks can't. There are ways!! :wink: