My NOtebook with 945gm Chipset, GMA 950 0x27a2 and ALC883 ADDRESS 1 make some Problems.

The first thing is, i can't get my onboard card to work,
i tried different kext and efi-strings.
At 10.5.6 it wasworking with some Artefacts.
I tried dsdt patching from the gma 950 desktop thread at insanelymac, but i failed.

Second, the soundcard is although working, but the sound is a bit choppy, and in accu mode total crap.
Maybe it's because i'm using a kext kombination for address 0.
VoodooHDA works fine, but without line-out

And the third thing, sleep doesn'T work.

The install is iPc 10.5.6 installed with ICHX and RTL819 and GMA 950 kext.
Then updated to 10.5.7

What are your suggestions?