Holy sh*t, tvtool made a HUGE difference. I was about to scrap my plans to make a divx box because I couldnt find decent enough tv-out.
The standard nvidia reference tvout had horrible text, and the entire picture was way way too bright and milky. It didnt even take up the whole screen, and the filtering was horrible.
Installed tvtool. Black became BLACK, instead of grey. I could set it so it took up the entire screen. I was able to put on a fine dvd filter, a text enchancement filter, and an adaptive text filter. HUGE difference.
What I thought were inherent problems with tv-output were not, and, some of those divxs look perfect dvd quality now.
Worth the $10 registration any day. Try it out, its soooo worth it.
BTW, beta6 of tvtool didnt work for me, if you had problems, try out version 5.5.
My suggested settings (if they apply to your chip):
Set the res to 640x480, turn off macrovision, set it so the entire desktop shows (fullscreen was overkill for me). Click enhanced text, set flickerfilter to DVD-N, and adaptive filter to 5. Leave the rest at default. If you want to mess with color and contrast, youre better off doing it on your tv.
Create a shortcut to your startup group, and itll start up every time. Then just ctrl-F1 for tv-out, and ctrl-F2 for monitor. Sweet.