I have successfully installed iAtkos v7 on my MSI GX620. Everything is working properly except for the wifi card and sound. According to this url OSx86, everything should work out of the box except for the wireless card. But most of the ktext he mentioned is not there so I guess I need to download it and integrate it to the installer.

Now my plan is to use a retail snow leopard disk and manually patched it for my own needs. The question is... how? Most of the tutorials I found here are for specific hardware. I don't know which part to follow. Can anyone here guide me?

Here is my laptop system specs.
CPU: Intel Core2Duo T7350 2.0GHz
Graphic card Nvidia 9600M GT 512MB DDR3
RAM: 2x2 GB DDR2 800MHz
500GB Toshiba MK255GSX
Optiarc DVD-RW
LAN: Realtek PCIe GBE Famile Controller
Firewire: IEEE 1394 @ 400 MHz
Keyboard/Trackpad: ... I don't know but Apple PS/2 works fine for me.
Sound: Realtek High Definition Audio.. I don't know why it didn't work. What ktext should I use?
Wireless: worst part. Intel Wifi Link 5100 AGN
Bluetooth: Bluetooth RFCOMM
JMicron 3 in 1 Card reader

I've used iatkos on that laptop and here's what I have found to be not working.

cpu - dual core does not work and using dsdt does not help

mouse/kb - tapping on the mouse pad does not work with voodoops2

sound - don't use the included voodoohda, install the latest version and it will work, both headphone and speaker. I dono about line out or optical

The wiki you linked if for a retail install of 10.6.x, I have tried it and have had 90% success.

1) make a usb installer
2) include only voodoops2, appleacpips2nub, fakesmc (no dsdt needed)
3) install
4) boot, you should get into 64 bit mode with no problem.
5) install voodoohda and any other kext you might need

I had a problem with keyboard detection so i used an external keyboard for the install, need to find a working version of voodoops2 i guess. You might not have this problem.

As for wireless, it's best to cough up about $30 to get a broadcom equivalent of apple wireless. I got an atheros one and it refuses to work on 10.6.x

Hope this helps