Using Video overlay on 2nd monitor ...

OK, got a few questions.

First off is - is there any way to use a video overlay on my secondary or ternary monitors? I know it can't hardware process it but is there some software or something that could software render it? I'd love to be able todo this without buying a Matrox card

Next off is - how do I run a monitor in 16:9 resolutions, my shuttle will be connected to a widescreen TV and I've seen people get 800*450 and equivalent but I had a quick flick through the resolutions of my GF4 (Will be using onboard S3 chip for shuttle), and theres only a few 16:9 resolutions which are much further up the scale (like 1280*720) which obviously you can't display on a normal TV. Will it pickup the different resolutions when I plug it into a 16:9 TV? if not is there any way of forcing them to display?

Thanks

depends on the drivers i reckon and manualz..soz