1) i can't get into snowleopard without adding -x -v on boot and finally be in safe mode.
Probably related to your video problem.
2) i can't get access to my ATi 5750
If it doesn't work with latest Chameleon, try Kabyl's versionhttp://www.insanelymac.com/forum/index. ... pic=231768
or injector kext from netkashttp://netkas.org/?p=465
You may need to use "arch=i386".
3) i can't use my sound card ASUS XONAR D2 (neither from my on board one)
What's the audio codec? You shouldn't install both legacy kexts, just the right one
4) i can only use 2 GB of ram. if i place the other 6 i can't get into snow leopard
Remove dsdt.aml, add RAM and run Auto-Patcher again.