Well, I wonder if it's something else in the video chain then. For the record, here is what I did:
Ran the Advanced setup, and selected all resolutions. Went into the channel up/channel down menu and selected passthru. After I turned the box back on I am getting a non-HD 4:3 480i signal on an HD channel.
Don't get why, but I will keep playing with it till i get it working.
JVC RS25 Projector/84" 16:9 Da-Lite Matte White Model C Screen
Panasonic TC-P65VT60 Display
Oppo BDP-103 Blu Ray Player
Emotiva UMC-200/Aragon 4004MKII and EAD PM 500 amplifiers
NHT 2.5i (2), NHT AC-1 (1), SP-B22 (4) 7.1 Speaker System Rythmik F12 Subwoofer
Darbee Darblet Video Enhancer and DSpeaker Anti-Mode 8033Cinema