To get your screen to go to 1024x768 (my new year's resolution!

), as root, go into xf86config in a text editor and scroll down until you see the screen resolutions. Add "1024x768" to the front of the line - the line should now read "1024x768" "800x600" "640x480". Restart X and you will now be able to use it.
I have never had a problem with nvidia drivers, just read and understand the instructions on the website.