OK, after a couple of hours I prepared a SINGLE usb stick with OSX and your files uploaded to mediafire.
I installed without any problem snow leopard on my internal hard disk, and i can boot with usb stick, but now I am stuck at this point:
I copied the your mediafire files (boot, boot sector, etc) into my hard disk with snow leopard, but it won't boot. At prompt it says: operation system not found. If I bot from usb I have no problem and I can check my system is perfectly loading.
What I have to do? Install chameleon on my boot partition? I tried with chameleon 2.0RC5 without any luck (always the ATI problem just like above). Thanks in advance!
P.S. after installing snow leopard with your instruction I noticed my EXTRA folder in empty in my hard disk. O__o Is that normal? Can you post or upload the content of your extra folder after installing SL?