crashmeister yes you where right thanks I googled around a bit and found that slackware 9.1 has sometrouble with the new Nvidia installation pakage. I was able to find a website that i followed exactly to get everytyhing up and running.
For those that have the same problem my solution was:
Uninstall the package using the --unistall option
Download versiion .4496 tar.gz drivers
I also then had a prolem with my XFree86 config
So I also had to run Xfree86Config and make the approriate changes to my config file to get X windows up again. Everything is covered much better in the post at the above URL.
Cheers thanks for the help