I have had a few media players/PVRs in my time. In fact I have 3 at the moment - a DXtreme(MP and PVR), a Noontec(MP) and the WD TV Live Streaming.
Both my others allow you to put a picture file (jpg) in the root directory and when the USBs are connected will show the picture as a means of identitfying the USB/Flash Drive. In fact you can have a movie file AND a jpg with the same name and the picture will be displayed as an icon for the movie.
Can this or something similiar be done on the WD TV Live Streaming?