I have got hackintosh (updated to OSX 10.6.4) installed on my PC and it worked pretty well (though it didn't recognize my 8600GT) till now.
Trying to solve the video card problem I tried installing the latest myHack patch on it.

Ever since then, when I boot, on the user selection menu - I enter the password, it looks like it is loading the OS but then a black screen appears and it returns back to the same menu.

Does anyone know which configuration/kext might cause it?
I got a full access to the hard drive from my Windows partition, if it helps.