Whether you can run 848x480 on your Xenarc is up to your video card. If your video card can run this resoultion then you that is what you need to set CF to. Otherwise you can run 800x600 on your Xenarc from your M10000 and then you would want to run the 800x600 stretched skin. This skin will look funny on your desktop monitor but will resize properly when displayed on your Xenarc.
CF is best controlled through a touchscreen and possibly the use of a remote or external buttons that trigger the hotkeys. You shouldn't need a keyboard.