Hi, I have currently running a Snow Leopard 10.6.7 on a Samsung R580 i3 330 and Nvidia 330M, installed and updated 10.6.3 with 10.6.7 combo, the issue is to make a copy of the kernel and kext before to upgrade and after upgrade and put back without rebooting the kernel and kext kept back in place, then without rebooting and it always run the utility for kext later and after passing the kext restart utility, with it must restarted without panic. Good luck.
I have a another problem, I can not boot from the hard drive without iBoot dsdt I tested with a R480 but I can not boot directly, I imagine I'll be doing something wrong, greetings and thanks.