So, basically the DVD boots fine with the "cpus=1" flag then everything installs fine then when it has finished installing i press restart bootloader loads up but then i just get this screen:

then nothing would happen just stuck at that screen.
So i try single user and i get theis screen:

But the same as the other one it just stays like that and nothing happens.

Here are my PC's specs:
Intel Core 2 Quad Q8200 2.33 Ghz
4GB RAM 800mhz
my mobo is apparently called: Dell studio 540 which is the same name as the PC.
I have a chipset Intel G45 but i use the ATI 4890 in the PCIe slot.
Also i am dual booting with Vista, i can get Vista to boot up fine with startup repair but Mac OS X wont boot up.

So any ideas?, thanks

ooo that was some great help