Mount ESP and go to EFI/Oz/Darwin/Extensions/common here put your network kext and your Sound kexts put in S/L/E.
DSDT and SSDT put in EFI/Oz/Acpi/Load
Audio: AppleHDA für ALC892 ink. HDAEnabler 1
Network:RealtekRTL8111.kext.zip
For Audio kext use kext wizard app
Disable Nvidia Injection-> open terminal and put this command
But dont touch it. GT640 work without this command.