I have solved to other things

1. Sound ALC662.pkg from www.kexts.com solved the sond issue and most important ALC 662 is appearing in System profiler->Audio (Built in) -> Intel High Definition Audio. Yeeeeeyyyy!

2. WiFI works as it should with the kext again from www.kexts.com -> the original 10.6.6 release IO80211Family.kext. Fantastic! The problem is that I have updated the system to 10.6.6 in the first place but something went wrong with this driver.

Now, if only I would solve the shutdown issue!!!!! Hmmm