Esse vídeo não tem suporte, é Arrandale e não HD 3000 (Sandy Bridge).
O máximo que se consegue é aceleração sem framebuffer http://Olarila.com/forum/viewtopic.php?f=3&t=124
Se o CPU é i5 460M como diz no seu perfil, o vídeo não é HD 3000 mas sim Arrandale http://Olarila.com/forum/viewtopic.php?f=3&t=124
Se não funcionar com "Graphics Mode"="1366x768x32", não tem jeito.
I would start over. Only install kexts you are sure you need. First make the system boot from HD, then install other kexts (audio, network) and make configurations and patching (DSDT, power management) http://Olarila.com/forum/viewtopic.php?f=27&t=1716
The 10.8.2 USB image doesn't have NullCPUPowerManagement, it has Disabler for both AppleIntelCPUPowerManagement and ApplePolicyControl. Looks like it's loading kexts from somewhere else. Do you have /Extra/Extensions in 10.6.8 partition?
That's strange, it should give you the option to boot the installed ML. Try using Chameleon from the USB (type 1 at boot0 screen).
Are you sure the installation finished without errors?
The only guide I know is this one
http://www.projectosx.com/forum/index.php?showtopic=465
You can use VoodooHDA to get audio working with less effort http://Olarila.com/forum/viewtopic.php?f=18&t=454
Or you can try to get help here http://Olarila.com/forum/viewtopic.php?f=9&t=1933
No man, you are making a big confusion, that info is for display-cfg, not for IOPCIClassMatch. Read the links I gave you, forget about NVEnabler, you don't need it, you can use GraphicsEnabler.
No, first you move all video kexts to be able to boot the system, as in link one.
Then you edit NVDAResman and NVDANV50Hal as in link two and re-install them, together with NVEnabler or GraphicsEnabler.
Move video kexts until you fix them http://Olarila.com/forum/viewtopic.php?f=27&t=1677
You probably need to insert ID in kexts http://Olarila.com/forum/viewtopic.php?f=18&t=154