I actually bought Vista Pro (still have it somewhere) and never had a problem with it on my M-Tech 030/28 + FPU.
Have you tried running it on any of your other systems? Perhaps it's a HD installation problem - something not properly assigned or a wrong tooltype (does Vista need reference to the 060 library?) Sorry - can't remember the exact terminology or syntax - it's been a long time since I've dabbled in this sort of stuff:(
