EDIT: See reply below for a more elegant, and simple solution, requires one character KEXT EDIT, to get all built-in motherboard SATA ports working perfectly (should work with Mavericks USB install as well, just substitute method for USB instead of Boot HDD)
I had to cut a lot of corners here, and I may have to switch to an IDE DVD-RW drive, as the Mac boot (2xHDD installed) I have is running from a 2-port ASM1061 SATA3 PCI-e card.
I used my existing Hackintosh Time Machine backup, and made sure the SMBIOS.plist was identical on the MyHack Mavericks installer USB. I could then restore from my Time Machine backup to this machine (both HDD plugged into ASM1061).
I have a GeForce 8500GT 512MB, and the only way I can use it was to use GraphicsEnabler=Yes. I also use npci=0x2000 and PCIRootUID=1 in my Boot.plist.
I am using Voodoo 0.21 for audio.
I am using Kext Utility to manually update the Kext Cache -- machine boots to desktop in ~10 seconds with UseKernelCache=Yes.
I am using BCM5722D.kext for ethernet. Does not work after sleep, but can be manually reloaded. I am looking into a RELIABLE script to do this automatically with SleepWatcher.
I have a SiliconImage 3114 PCI SATA card, and two VIA VT6421 PCI SATA/IDE cards, but with PCIIDE.kext or AppleVIAATA.kext, there is still no DVD-RW visible. This is a HP BIOS DVD-RW, but I have no other SATA models to test with, I do have one working IDE model, which I might test in the motherboard's IDE port.
List of things working:
2 x Quad-Core Xeon 2.33GHz -- 2 power states, 2.0GHz and 2.33GHz. C2 State a possibility - mentioned in BIOS.
4GB 667MHz DDR2 RAM - Strange, it shows 9 slots (only 4 in machine) and slot 9 is a 1MB ROM???
GeForce 8500GT 512MB PCIE - Perfect, QE/CI OpenGL and CUDA all perfect.
Sleep/Wake working perfectly (darkwake-0) -- USB2.0 and graphics working across sleep.
BCM7555 working with BCM7522D kext. Does not work across sleep.
USB2.0 - all ports, even working across sleep.
Audio - ALC262 working via VoodooHDA 0.21
Rolled back AppleACPIPlatform, and it seems to have gotten rid of the beachball of death
Used M*ltiB*ast for all installs/rollbacks, and KextUtility for kext installs/kextcache creation.
Working Firewire400 card, just noticed firewire port on front of workstation, there may be Firewire built-in as well?!?
App Store/iCloud both working fine.
All software (except DVD Player, which complains of no Optical Drive) working sweetly, and quickly.
List of things not working:
Ethernet not working after sleep -- can be unloaded and reloaded manually.
DVD-RW -- I need another working SATA port, and a non-HP drive to get this working. I just remembered I have a working Firewire400 optical drive enclosure (IDE) so I will certainly give that a try.!!!
I would like more power states, but I am unsure if these processors go below 2GHz ??? I do not understand C2/C3/C4 states at all, so will not try that out for the time being.
Posting this from this very machine. LOVELY!
Need a new heatsink/fan for my exposed/jerry-rigged fan on the 8500GT.