Hi Guys...and thanks for the quick replies. I had a feeling that might be the case. Some projects use vsts like Realstrat and B3 Hammond, so presumably i can expect trouble!!
Scook , it sounds like the best - although least easy solution - is to keep HS6 and run X3 sepatately.
I do have two desktops, so maybe I'll keep the XP one running HS6 for the time being.
Thanks again for the help