Hello all,
I'm a late comer for my hackintosh. I didn't know about this thread until I was referred by the owner from the other thread. It would save me lots of nights trying to install retail snow leopard 10.6.3 on my hackintosh. None working out there and none supported with the new 10.6.3.
Anywho, thanks to this thread, I got mine working in 5 hours.

1. My system is MSI X58 Platinum (non SLI), i7 920 OC @ 3.6Ghz (180Mhz base) 6Gb triple channels Cosair 1066, ATI PCIe XT2600 HD, Airlink101 AWLH6070 wireless 150N, Brother MFC-665CW, ACER P244W, all SATA drives and DVD, no ATA connected.
2. Installed on 1 drive 400GB Leopard 10.5.8 using iDeneb 1.6 & iAtkos v7 combo.
3. Bought a retail Snow Leopard 10.6.3 on Amazon for $28.8.

Now the installation using this guide.

1. Installed on 500Gb drive clean using the hacked way . Yes, finished installing with errors. Ignored it.
2. The downloaded Chameleon install package rc3 doesn't boot. Use myHacker1.0.1 to install in the new installed (with errors) "snow leopard 10.6.3".
3. Edit "Extra/Extensions" folder in the new installed drive "snow leopard 10.6.3", add all the kext files from this guide + ATY_init (for my XT2600 ATI) and dragged the DSDT.aml from the working root folder 10.5.8 to the root of the new "snow leopard 10.6.3".
4. Remove AppleATIX2000.kext from the new system Extensions, this one caused kernel panic.
5. Set bios to boot from the new "snow leopard 10.6.3"
6. So what's in the myHack1.0.1 com.apple.boot.plist?
a. Kernel Flags = "arch=i386" (runs default at -x32).
b. Graphics Mode = 1024x768x32
c. GraphicsEnabler = Y, Pcie=1
7. The board doesn't display, just a blue screen and sit there for 15 minutes. Something is wrong, the graphic card doesn't work now even with low resolution force. Luckily, I had an extra ATI HD3450 ($19) from NewEgg last year, swapped XT2600 out with this one. I booted up to the welcome screen in less than 2 minutes. I was so happy to see the registration page. Reboot and set "Graphics Mode"="1920x1080x32@60", and the display came up with 1440x1050 with this ATI HD3450. Well this not important for now.
8. Use Kext Helper 7 to install ATY_init.kext and VoodooHDA.kext.
9. Reboot, but the ATY_init.kext didn't do anything for ATI HD3450, still at max 1440x1050. Well, swapped this out and back with ATI HD 2600XT card. Edit the com.apple.boot.plist in the Extra folder and replaced 1024x768x32 with 1920x1080x32 and Pcie=1 to Pcie=0. Reboot.
10. Beautiful screen @ 1920x1080x32 came up... it even has all the screen resolutions option for me to choose.
11. Remove the "arch=i386" from the com.apple.boot.plist and it didn't boot at all... Need help on this please.
12. PS2 keyboards and mouse didn't work either, it worked before with 10.5.8 even installing the ApplePS2.kext from the 10.5.8 system... Need help on this one too please.
13. Preview doesn't work, open a picture and it's blank. Help on this please.
14. Screen capture to file, I can hear the clicks but NO pictures appear on the desktop. Help on this please.

The snow leopard 10.6.3 seems to be faster but until I get all the kinks out, I like the 10.5.8 better with all printers, ps2 devices working and especially the print screen.

Thanks again X986123 for a real working guide,

Louis

PS: I'm writing this up with screen shots here when I get everything working.