I've successfully replaced one of the bitmaps on the Device Overview with one of my own! Now instead of an ugly button that says "DVD" I now have the DVD logo as my Device Overview button.

To download it, the trick is to load it into NeoEdit and immediately download it without NeoEdit saving it. If NeoEdit saves it, it recreates the Device Overview page.

This is really cool. Maybe I could come up with some software to automate this process. Has anyone else had any luck?