Our new house has been prewired for surround sound with the reciever, etc. in a pantry away from the TV. The outlet at the TV has three "HD-ready" coax. The guy who wired it told me that I could use one coax and split it to the three component RCAs and the other for composite sound. For the life of me, I can't figure out if this is correct or not, let alone how to do this. Does anyone have suggestions or ideas? Where can I get the adapters I need? Help a poor moron.