This is a longshot but does anyone know how to get the UR5U-8820L remote to change the aspect ratio on a Panny 54v10? I've tried all of the codes and the most functionality I can get is turning the TV on and off and changing the channels/volume. This is the remote that is supplied with my HD box from the cable company.

http://universalremote.com/product_detail.php?model=125&cat=Discontinued%20Models&ana=Digital