so are you saying that you don't get the desired 1024x768 resolution, or do you just get crappy quality? that would be probably because you are choosing 8bit, which only allows for 256 colors. choosing 16 or 24 bit modes would allow for a better quality image. However if you are not getting 1024x768, chances are either your system is still trying to load nv drivers instead of t he nvidia, (check the readme for info on that), or possibly the video driver isn't installed right? maybe try to reinstall that? What distro are you running? Just a newbie trying to help a newbie.
Celeron 633, Running at 790Mhz w/83Mhz FSB.
Currently running Slackware 8.0
etc, etc, etc.