For those of you wondering i purchased copilot and it works reasonably well at 640x480. It's certainly usable.
I have to disagree. There are many buttons that are not showing, the bottom of the screen (where the dynamic display items are) is gone. Like someone said the 'exit' button is gone. The onscreen keyboard is messed up. Think twice before committing to copilot if you have to use anything less than 800x600.
I will double check the resolution i have my computer running at. I was never able to get the screen to work properly with a resolution of 800x600.
But, i'm not saying it's not impossible. I'll follow up in a week when i go to my car again. I know i messed around with the composite settings on my ATI Radeon as well. Is it possible you have overscan on?