nVidia drivers and TV-OUT

[Andrew]

Hi,
I've got a 6600GT AGP card in my desktop and been trying to get it
to do dual display LCD + TV (for a while) Low-Def TV is PAL-Aus
On boot it shows the text screen on both the LCD and the TV, but
when I startx the TV goes strange (nothing that looks like hires
graphics)
To make matters worse I just got a 1680x1050 screen and had to
up my kernel (2.6.20-1.2944.fc6) and upgrade xorg server
(xorg-x11-server-Xorg-1.1.1-47.8.fc6) to get that to work
Preferably as 2 screen rather than duplicating one screen on
both (since one is 1680x1050 and the TV is WAY smaller than that)
Can I do that with the nv driver or do I need the driver from
nVidia?
Has someone got a sample xorg.conf that works like this?
I've tried all sorts of options with the nv driver but have been
unable to get it to work since I'm not sure exactly how xorg.conf
should look or even if that works with the nv driver, and I can't
seem to find a clear example googling either
-Thanks for any help