Hey Mac Man, & Tony,
I am Running P55M-UD2 V1.1-Core i3 540, EVGA GT240 Bios F11 with GT 240,
Had succesfully installed on GT 240 with 10.6.3 no multibeast, ran 10.6.5 update, rebooted right away(sighs....big mistake restarting) then rebooted, and guess what KSOD-Kernel Panic Screen of Death...