Yep, a skinning app would rule... think about all the skins that would be comming if everyone could do some.
Also it should have a "menu" to select what part of the player it is displaying - Main, Main+menu, Main+search keyboard, DVD, Radio, etc...
it should have a demo mode to ensure the 2 images are correctly drawn and all is working. The demo mode would simply have the buttons and clicker and pass from mode to mode... or it could be a demo part on the bottom with only the size of the "box" of the button that you could click and would display the 2 images you would have (no click/click)
That would be great.