hey, you cheated. that wasn't there when I looked first!
well I looked at it and something's missing, I think. You want to use dual screens you have to activate TwinView:
Option "ConnectedMonitors" "CRT, TV" # Monitors with s!!!
Option "TwinView" "On" # [<bool>]
Option "TwinViewOrientation" "RightOf" # <str>
Option "MetaModes" "1280x1024,1280x1024; 1024x768,1024x768" # <str>
I think those lines are needed to work. I use this to get my dual monitor setup working but that shouldn't differ that much. You have to change the MetaModes to your needs though. Look for the semicolons and commata notation!
I hope I could help you.
BTW: If you do an "XFree86 -configure" X tries to guess your setup. It probably won't detect your TV but it gives you a full list of parameters for the drivers in the newly created config-file.