Fran, you should have no problems at all using Edirol's HQ Hyper Canvas with Windows Xp Pro. Good sounding music awaits you!!!
However, you do need a wrapper of some kind (DXi or VSTi). You could use V-Stack (Steinberg $70), Brainspawn ($60 - $100), Console, etc. You would need to make a decision on the wrapper first and then purchase the appropriate version of Hyper Canvas. Using a wrapper may be good thing in that it gives you the option of loading other synths (B4, etc.) at the same time.
Some of the older versions of these soft synths were written for the older versions of Windows and will not work on Windows Xp. Hyper Canvas will work with older versions of Windows as well as Windows Xp.
Hyper Canvas responds very well to VanBasco or Windows Media player. This includes program and control changes.
Fran the world is your crucible in which to mix the chemicals of your choice.
[This message has been edited by Frank L. Rosenthal (edited 09-01-2003).]