GrandTec GEZ-1000 USB 1.1 PC To Video Cable...this is what i use for my laptops.....it connects to your VGA out on your laptop and provides S-video, RCA and another VGA out..your computer will read this automatically as a monitor....this way you can go inot your display properties and customize your settings and with one click u can open hoster and you're display setting will be there automatically....no configuring after initial setup.....this is a great piece....sorry no coaxial....heres a link to an online copany...
http://store.grandtec.com/pctotvcon.html
u can buy these way cheaper than from the manufacturer