Came across this from Google was looking to do the same thing using charter universal remote to change aspect button efc for my 720p Panasonic viera. The 994 reprogram with efc code 09761 worked perfectly. Sorry for the resurrection of an old post but I like finding solution to my specific issues so hopefully I may help a fellow newbs that may find this. Lost a remote for DVD and the charter remote wouldn't run the select button on DVD nor the right efc. Figured that out. Glad there's so much info out there on these codes. Not sure what else I need to try and control but thanks everyone for talking to time to generate these codes