There's a little program that needs to be run on the empeg command line, called
setvisual (or possibly setviz) that performs a binary hack on the player binary, replacing the TuxMuch image with a pic of your choosing. It used to work on v1.03
software, but I don't think anything has changed that would prevent it from working on 2.0bX versions. If you can't find it with a search here or at riocar.org, holler and I'll send it when I get home tonight...

/Michael