I have not built a rig since ddr 400 was out.. lol I recently purchased an asus P5N-D from my brother but he cant find the installation disk. I ALWAYS use the manufacturers disk and then update through nvidia. I am having crazy BOSD issues and the BOSD codes are not on the internet! anyway... I have to ask this :
Can you take an out of the box board, mount it and just go directly to NVIDIA and DL there GPU and mainboard drivers and your good to go?
Usually, you have to at least have a driver for the LAN port, in order to be able to get to the internet. I would suggest downloading the drivers onto another computer that works, then burning them to a CD and use that to install the required drivers.