Heya guys
kibz27 - the A8N-SLI boards all run the nForce4 chipset. Vista has this chipset driver by default when you first install it.
I'm not entirely sure why you're being told that the network driver can't be found. Worst case scenario (I'm assuming your going to be installing the 32bit version of Vista?) you can attempt to install
these if the network doesn't work.
But it should automatically pick it up. It did for mine