I'm on several Vegas forums and don;t recall anyone trying this. That's not to say that it won't work, just that Sony won't support it as Pro 9 was, as I recall, designed for XP. You have nothing to lose but some time so go ahead and try it.
For video editors, finding the perfect portable workstation is like catching a unicorn. It is no easy task to find the perfect balance of performance vs price point.
