This walkthrough is for those of you smart enough to buy an NVIDIA GPU rather than go through the torture of trying to get the onboard Intel X4500 graphics to work with OSX. Below, I basically copied 95% of the walkthrough I did for the vanilla, basic walkthrough without the NVIDIA card installed, but changed the bits that were pertinent to the video card.
I’ve done another write up about how to install with iATKOS v7 but graphics functionality is reduced as it uses the onboard Intel GPU. The installation on this page, in my opinion, is better. Click here to see the iATKOS installation.
Please note – I used an MSI N8400GS D512H which fit the bill as it was cheap (under £50), fanless (nice and quiet for my HTPC) and had OSX86 compatibility (QE/CI) and Ubuntu compatibility.
Originally I bought this motherboard with the intention of running XBMC on top of OSX. It was a toss-up between Ubuntu 9.10 and an OSX86 Hackintosh flavour and in the end Ubuntu won, but only because it was marginally quicker to boot up and support for this setup on the XBMC forums seemed to be a little better.
Anyhow, I think that at least a few people should find this walk-through useful so I thought I’d write it up. Originally I was going to write it up using iATKOS but you needed to mess around with NVinject, and the installation with iDeneb seems to be so much easier.
I installed the MSI card before I began and used the DVI output to connect to my monitor.
Setting up the BIOS
So, onwards and upwards. After installing all the components into the case (I used a SATA hard drive and port closest to the edge of the board) and having downloaded iATKOS V7 iso from one of the usual sources and burnt it to a DVD I had a quick wade through the BIOS to check the settings.
To start with I selected ‘Load Optimized Defaults’, save and exited in case the HDD needed to be redetected, then went back into the BIOS.
Here’s what I did on each page – I am only documenting settings I changed from the default:
Standard CMOS Features
On all IDE channels that weren’t in use I went into each and selected ‘NONE’. Although on the main page it already says ‘NONE’ I go into each and manually disable those not in use. In my experience it stops the motherboard detecting drives every time and can speed up the POST.
Drive A – ‘NONE
Halt on – ‘No Errors’
Advanced BIOS Features
First Boot Device – ‘Hard Disk’
Second Boot Device – ‘Disabled’
Third Boot Device – ‘Disabled’

Advanced Chipset Features
As I was using the MSI card I’d bought I chaged the ‘Init Display First’ to ‘PEG’
Integrated Peripherals
Onboard Serial Port 1 – ‘Disabled’
Onboard Parallel Port – ‘Disabled’ – I don’t use any parallel or serial devices.
USB Keyboard Function – ‘Enabled’
USB Mouse Function – ‘Enabled’ – Otherwise your (USB) keyboard won’t work during setup.

Power Management Setup
I left all these settings as default.

PnP/PCI Configurations
I left these as default.

PC Health Status
I left these settings as default, and couldn’t be bothered to take a screenshot.
OSX86 Installation
Please note – it is best to do this part connected to a standard computer monitor/flatscreen. Otherwise you end up having to choose options and press buttons that aren’t visible on the screen, a bit like this (this is from an earlier iATKOS installation):

If you use a widescreen TV, you may not be able to see or select buttons during installation
Now the BIOS is sorted, let’s get on with the actual installation. Connect the DVI cable to your NVIDIA card, pop the iDeneb v1.5.1 DVD into in the caddy, hit ‘F12′ as it runs through the POST to bring up the Boot Menu and select ‘CDROM’.
When it asks to ‘Boot from CD/DVD’ make sure you hit return. Another message with something like ”Press any key to start up from CD ROM…’ pops up a few seconds after, hit return again.
You should have the Apple logo up whilst the installer loads – after 10 or so minutes the a asking to select an installation language.

This next bit is important. You will now prepare your hard drive. When the ‘Welcome’ screen pops up you get the Apple menu along the top of the screen. Click ‘Utilities’ – ‘Disk Utility…’
The entire contents of this drive are about to be erased. Please ensure you have no important information on your drive because if you come whining to me I will honestly not give a fuck.
Select your drive in the left hand pane (in the screen below I already had a ‘Mac OSX’ partition created, ignore this), and click on the ‘Erase’ option to the right of ‘First Aid’. Choose ‘Mac OS Extended (Journaled)’ and name your new partition (I used ‘Mac OSX’). Hit the ‘Erase…’ button. A warning dialogue box will pop up, just hit the ‘Erase’ button again.

Close the Disk Utility and you should be back to the Welcome screen. Click the ‘Continue’ button and the Software licence agreement should pop up. Now Click on the ‘Agree’ button.

Next the ‘Select a Destination’ window will pop up. Select your drive and click ‘Continue’

The ‘Install Summary’ page pops up. This bit is REALLY important.
Click the ‘Customize’ button.

Don't forget to hit the 'Customize' button
Under ‘iDeneb Patches 10.5.7 Ready’ – ‘Drivers’ – ‘Video’ – ‘NVidia’ select ‘NVinject 0.2.1′. Don’t select anything else. Click the ‘Done’ button.

Hit install and make a nice cup of tea whilst it writes the data to disk.
I normally skip the DVD consistency test that next pops up. If it is the first time you are intalling you may want to let this run.
The installation time will depend on the speed of your DVD (hardware) and hard drive. My DVD is pretty old and slow, so it took about 15 minutes to install.
Your machine should reboot and you should see that hideous Chameleon graphic before it boots into OSX. Next you should be asked to identify your keyboard. Follow the instructions and choose the country you’re in and your keyboard layout.
When it asked me if I already owned a Mac, I chose ‘Do not transfer my information now’.
On the ‘Registration Information’ screen, I typed in my name and made up everything else in the compulsory fields.
When ‘Create Your Account’ popped up, I filled in all the fields and chose a password.
I selected ‘I don’t want to try MobileMe for free right now’.
When the ‘Thank You’ screen pops up, hit ‘Go’. Boom, all done.

You're welcome.
Your new Hackintosh is all finished. I know the network/ethernet works fine, as does the sound. As for the troublesome power management capabilities, the ‘Sleep’ function works, but when you shut down the power light stays on, so it’s not quite there. As soon as I figure out the fix I’ll edit this post, or if anyone knows how to sort it, let me know!