It also wont change screenmodes once Ambient loads up. If I change screenmodes and reboot it just defaults back to 640x480?
yeah I'm not sure how to change screen modes, but if you go to the Ambient right-click menu, settings, system, and then monitors, you can pick a monitor profile, add/remove modes, and play with custom timings (which is very nice BTW). I deleted all the modes except the one I wanted and now it uses that when it boots.