nVidea 7600GT 256mb - Desperately T_T

I installed 10.5.5 on a Dimension 4600 using iAtkos v5i, AppleSMBIOS netkas, ToH kernal, and EFI Boot v9. The only way I could even get it to boot was using NVkush, and that would only enter safe boot. I tried a hundred other options to get my EVGA 7600GT 256mb AGP card fully accelerated (Quarts and Core support), but the furthest I got was the ability to boot in normal mode with no acceleration support. I'm in desperate need for a fix, I am SO tired of reinstalling the OS (iAtkos takes 45min to install, and I wind up unbootable at least 4 times a day while trying diff solutions).
Can somebody tell me how to make this work. If theres a better installer for 10.5.5 then iAtkos 5i for my setup that would allow easy installation of the card(and hopefully faster) or if you have a method to install the kexts/EFI strings/etc. that will make it work, please tell me. Also share on things to avoid or delete before the installation of the card (like deleting certian kexts before installing a new one). My setup is as follows:

Dimension 4600
Intel V/100 Network
P4 3ghz SSE2 Processor
Intel SATA 120 GB HDD with XP/OSX Dualboot
SoundBlaster Live Value! Soundcard
EVGA nVidea 7600GT 256mb AGP (the only thing I'm having issues with)

PLEASE oh o.O O.o