I have tested this and it works fine XP pro service pack 3 so not many updates. It took me just under an hour to set up and install a few updates required like IE 8.
Once installed I do suggest to turn up the ram a little and let it take control of 2 CPU's if you have that option and also give it more GPU memory.
registration took a while due to waiting for an e-mail to activate account. Xp passed validation not that I suspected it not too
All in all a good bit of software and free thanks for the link Max