Thanks for the excellent guide. I followed it word for word several times, but I can't get past this kernel panic. Everything works fine as long as I am booting from the thumb drive. I can select the internal hard drive and it boots fine. Then I can remove the thumb drive as continue as normal.

However, if I try to boot without the thumb drive, it begins booting then immediately causes a kernel panic. The very first line in the traceback (barely visible behind the black "restart your computer" box) says this:

panic(cpu 0 caller 0x1c2a7459): "Unsupported CPU: family = 0x6, model = 0x17, stepping = 0x2"@/SourceCache/AppleIntelCPUPowerManagement/AppleIntelCPUPowerManagement-90/pnProcessor.c:210

Since many have had success with your guide, I must be doing something wrong. Any clues?