idk if you have tried but I use a dsdt edit that allows loading of the gma kexts unpatched for some versions of the gma 950. just a heads up if you haven't tried it. If this is in a netbook or a laptop you can try using netbook installer to patch the gma kexts for you and build a custom dsdt for your rig.

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MotherBoard: Asus P6T
CPU: Intel Core i7 920 2.67GHz Stepping: D0
RAM: 6.0GB Speed: 1.6 GHz Type: DDR3
Disk: 4.11TB
Display: ATI Radeon HD 5770 (PCIe x16) [1024MB/QE/Q2DE/QGL/CI/OCL]
Audio: Apple HDA
Network: AirPort ( AirForce one 54g )
OS: Mac OS X 10.6.4 (10F569)
Kernel: Darwin 10.4.0 Arch: 64-bit