Yes, the TV's Optical output and Prog Out audio outputs will send audio to your A/V Receiver.
There is no way around this on any of the external inputs - the audio for whatever you connect to the TV will be output in 2-ch stereo, and it will be up to your A/V Receiver to convert it to surround sound. My Tivo Series 3 is connected to the TV via HDMI, and i send the audio via the TV's Optical Out to my A/V Receiver which then converts it into Dolby Pro Logic surround sound. My DVD player's Optical Out is connected directly to my A/V Receiver though as i don't want to run it's audio through the TV.
Yes, the TV's Optical output and Prog Out audio outputs will send audio to your A/V Receiver.
There is no way around this on any of the external inputs - the audio for whatever you connect to the TV will be output in 2-ch stereo, and it will be up to your A/V Receiver to convert it to surround sound. My Tivo Series 3 is connected to the TV via HDMI, and i send the audio via the TV's Optical Out to my A/V Receiver which then converts it into Dolby Pro Logic surround sound. My DVD player's Optical Out is connected directly to my A/V Receiver though as i don't want to run it's audio through the TV.