Hercules Game Theater XP Problem

I installed the latest WinXP drivers for this soundcard. Vista tells me it is
not certified, but I tell it to load the drivers anyway.

Once I reboot, just as the desktop is being prepared, i get the blue screen
with PFN_table corrupt as the stop error.

I relize it is a little earlier to expect working drivers from many hardware
companies. But if anyone has had any luck with their GTXP, please let me know.

Thanks,

Rick