This is how I got it all working in detail...... bear with me.
Use Iatkos S3 V7 burned to a disc using imgburn or whatever.
Make sure that in BIOS, AHCI is enabled, cool and quiet and C1E are turned off and also that the sleep mode state is set to S3 only.
Boot the disc via cd rom boot priority.
If you boot with -v, then you can see what it is up to.
Let it run for about five minutes or so and it will give you a screen with install options.
Select utilities and disk utility at the top of this page.
Find your disk and partition it how you like with the GPT format partition table, and MAC OS X journalled format or HFS+.
Exit the utility, click next and then click customize before you install.
Select the quoopz mach kernel, the latest one for AMD devices, this seems to work best.
Select either RC4 or RC5 bootloader.
Deselect the sound options, I found these didnt work?? (Voodoo HDA 2.8.2 kext installed later did however.)
Dont select any boot flags, i fyou have an AMD graphics card, see if there is any mention of anything useful for you, try to keep your selections minimal and only select one of each type of thing.
Let it install to your HDD - about 20 minutes.
On reboot, I had to use cpus=1 busratio=19 npci=0x2000 maxmem=4096 -v -f as boot flags.
This booted and my network was working so I started the download for 10.6.7 update.
Google how to enable show all files, copy and paste the text into "terminal" on your mac.
Then goto root of your HD, find mach_kernel and save a copy to your desktop, right click and select get info, rename it to mach_kernel_x.
Go into S/L/E and find the kexts relating to IOUSB (2) IOAHCIport IOAPICplatform and the IOnetworking kexts.
Right click on each and save a copy to your desktop.
Then in the main library folder, delete the "caches" folder and in System/Library delete the "caches" folder there too.
Use Disk utility to fix permissions, then reboot.
On restart, install 10.6.7 combo update.
Once finished and before reboot, open terminal again.
Drag the mach_kernel_x from your desktop back to the root of your HDD.
In terminal type: sudo -s
then: mv /mach_kernel /mach_kernel_bad (include the spaces)
then: mv /mach_kernel_x /mach_kernel
these commands will replace the mach kernel with the one you succesfully installed with.
Drag and drop the kexts that you saved into kext utility, let it do its thing, then once it has finished, reboot.
Do similar again, only this time install 10.6.8 update. same kext and mach_kernel and delete cach procedure.
Hopefully after reboot you should still have your network and USB devices etc, if for any reason you dont, its time to google, see if any other kexts are known to work better.
Then I edited my AGPM kext to reflect the system profiler(mac applications) view of what my system was, mac mini or whatever, I found a lsiting within the plist that resembled my own card in that it had four power states and it was a device vendor 10de, or NVIDIA. Changed one of these listings to reflect the system profiler say so of what my system is, ie Macmini2,1, changed the last bit after device vendor to my card code, also found under graphics in system profiler, mine being 06cd. Used kext utility to install the edited kext.
Installed VoodooHDA 2.8.2 kext via kext utility.
Installed the Cuda drivers from Nvidia.
Installed the graphics drivers for mac from Nvidia, right click and show package contents then install individually, all except the preinstall.pkg, using the default install method, I got not supported message, however, this way works.
Used Chameleon wiazrd to update bootloader using download option to install latest chameleon bootloader, and inserted a new plist into the S/L/E folder with the things I needed for boot cpus=1 busratio=19 (whatever yours is in bios) npci=0x2000 maxmem=4096 GraphicsEnabler=Yes "Graphics Mode"="1920x1080x32@60" including the inverted commas on this one, although in Chameleon plist, you can just select the size you want, save the new plist file and drop into S/L/E.
Job done, fully booting, fully working mac with network, usb and sound support.