1st. - Preparation: Saved my Kernel (Blacknight)
make a Carbon Coby Clone

2nd: - Download and install

3rd: - Reboot
Before rebooting: exchange the 10.6.3 original kernel (back to Blacknight 10.6.2)

4th: - Everything correct?
No, sound is absent - but no problem

Over all time for cloning, downloading and new installation approximately 1 hour.

Best regards.

P.S.:

System:
Mainboard: XFX GeForce 9300 (no extra graphic card)
CPU: Intel Core 2 Duo E8400
RAM: 4GByte Kingston
Harddisk: 160 Gbyte Samsung

Special OSx86 enviroment:

PC-EFI 10.6 bootloader
in extra/extensions: AppleIntelPIIxATA.KEXT
AppleIntelPIIxATA2.KEXT
in systems/library/extensions: AppleAHCIPort.KEXT (modified for 9300)
AHCIPortInjector.KEXT
ElliotForceLegacyRTC.KEXT
EvOreboot.KEXT
Fakesmc.KEXT
NVInabler.KEXT