I haven't had as many issues with the 8.10 installs and the nvidia 8000 series, but on 7.10 this was always how I had to deal with it.
1. DL the nvidia 195.30 beta driver on another machine from here, http://us.download.nvidia.com/XFree86/Linux-x86/195.30/NVIDIA-Linux-x86-195.30-pkg1.run
(you can wget from host... but I like this method because I reinstall a lot, and like having it handy).
2. Rename it because you are lazy. I like NV1953.run
3. Put it on a thumb drive.
4. Start in recovery mode (root terminal)
5. Create a directory and change the permissions to all read write execute. I like...
chmod 777 /mnt/thumb1
6. Plug the thumb in. You will see some linux gook and in there will be a /dev/**** in my case, "/dev/sdg"
7. Mount it.
mount -t vfat /dev/sdg /mnt/thumb1
8. Copy the file to the home directory in case you need it again, then unmount and remove the thumb drive.
cp /mnt/thumb1/NV1953.run /home/linuxmce
and unplug the thumb.
9. Shell it
10. Answer questions correctly... (probably "no" "accept" "yes im sure") then after the install, it will ask you if you want nvidia-xconfig to run. Say no.
That will probably work... however...
12. If you get another failed to setup x, ctrl alt f1 or f2 and type
13. Let the wizard try and start, which always fails again...
14. Reboot into root terminal and repeat steps 9-11 exactly.
I don't know why... I only know it works for me on ALL nvidia 8 series.
*** as a side note, if a thumb is FORMATTED from vista, I have never been able to mount it in kubuntu/ubuntu. You can copy to and fro and it will work... but Vista does something weird in formatting. I have no idea what.