Very cool guys!!!
I will try the dual core thing first as that is the easiest...
If that does not change anything then I will also rollback SP1.
I'll also post my findings in case there are any other poor saps out there running vista that are getting screwed
Edit:
Hey, while I was in mucking around with the affinity setting, I also noticed a "priority" setting. Has anyone had experience setting this to either "High" or "Realtime" for fiesta.bin?