Got it to work.  Still seems to occasionally resize desktop on reboots.
I used 185.21 Win7-64 driver.
I had TV hooked up with Component out from 9500GT
I had a LCD monitor hooked up to the DVI
In Nvidia I set up multiple display, it showed my SDTV as an HDTV.  I set the component to 480i.
It would not let me change resolution below 720x480 in Nvidia control panel.  I went to the windows default
(change resolution) menu and it allowed me to change it to 640x480.  I then shut down, disconnected the LCD
and rebooted into windows with component video at 640x480.   
