Vista will NOT Install Motherboard Issue!

I have a Asus P4R800-V Deluxe motherboard and i am trying to install Vista
public beta 2 on a formatted single 120gb sata HD not raid configured booting
from the vista dvd.

1) If i enable sata in my bios and have my agp GFX card (Asus AX800XT 256mb
platinum) plugged in Vista will boot off DVD it gets to loading windows then
i get a black screen and have to reset pc.

2) If i disable sata in bios and have my GFX card plugged in Vista will boot
off DVD load windows files i click install now enter my product key, it gets
to the which HD do you want to install vista to list, but as sata is disabled
in the bios my HD can not be seen so obviously can not install vista.

3) If i enable sata in bios and unplug my GFX card, vista will boot off DVD
load windows files, i enter product key it gets to the which HD do you want
to install vista to and my HD is in the list i select my HD then click next
it will start copying windows files, It will the lock up during copying
windows files or expanding windows files and i have to reset pc.

All in all i think it could be an incomatability issue with my motherboard
ie the chipset or the sata chip.

Any help would be great!