ok this is very simple. Run the install and after the install is done boot to cd1 and run the rescue mode. Mount the partition you set your /etc to be in. type vi /etc/X11/XF86Config
then scroll down to the spot that has the driver info which will say "vesa". Change that to "nv". Reboot and you can finish your install.
Then finally configure the system to either A) boot into text mode or B) append the boot info for grub and boot into only text. Then run the nvidia installer and change /etc/X11/XF86Config where it says "nv" to "nvidia" and you should be done.