To get started I would like to share some things that I helped me.
The machine I'm using has an NVidia Quadro K3000m graphics card. The BIOS version is A08.
You need to check some things in the BIOS.
1. 'VT for Direct I/O' is disabled
2. 'SATA Operation' is 'AHCI'
3. 'Optimus' is enabled. At this point I can't get the NVidia card to work, so have to use the IGPU.
Install to a whole disk that is partitioned with GPT not MBR. I was installing to a disk in the second SATA bay, not an external USB/eSATA drive.
Only use the USB2 ports during the install. Specifically my laptop would only boot from the OSX install USB drive when it was plugged into the USB/eSATA port on the back of the machine.
To install OSX I used a USB install image of Mountain Lion with Chameleon installed on it. I can't remember the exact details. You'll need access to an existing OSX machine. It maybe possible to create the installer in Linux. There are guides that explain how to make the USB bootable with Chameleon. I also added some extra files to the USB. Like the DSDT, smbios and boot plist. I also copied some extra kext onto the USB for use post install. I'll attach the extra files I'm using to this post if I can. You could also use them with any hackintosh Mountain Lion install DVD that boots on the M6700, although I haven't tried any install DVDs myself.
If you are having problems booting the install media, try adding '-x' to the kernel boot options.
Once the install is finished and before rebooting. I opened a terminal and replaced/copied the extra kexts into /Extra and System/Library/Extensions on the newly installed OSX partition. I also moved all NVDA* and GeForce* kexts out of SLE.
I'm currently trying to get the NVidia card working. The M6700 isn't that useable as a hackintosh until this is working. It's possible to remove the card. Or maybe install a different card. By I tried with an ATI 6770m and the machine wouldn't power on. I would be very interested to know if anyone has more luck with using the Kepler based cards, or getting any other graphics card working.