I would suggest to make it a lot easier for yourself by starting to connect the setup properly.
- Connect your BC2 to the BV3 by using a scartcable. A S-Video cable doesn't contain data, which is send through the scart when you use DVD. Don't forget to connect the digital audio lead between the BC2 and BV3 (is used for Dolby D and DTS when watching DVD's)
try to connect the BC2 to the AV socket of the BV3 (name it "DVD") and the digital lead between the BC2 and the digital input 1.
- Connect your speakers to the BV3. Set them properly in your setup menu from the BV3 (Front speaker etc)
- Set the BV3 to option 2 (V-Opt 2)
- Set the BC2 to option 0. (A-Opt 0)
When wathing TV, DVD etc, you will have speaker 3 were the BV3 will act as a mono speaker.
When listening CD, Radio etc, the audio will be send through the ML to the BV3 and only the left/right speaker will start.