Also, if you mean "flicker", using S-video will make no difference: S-video is just like composite but with the chroma and luma seperated. You'll get just as much flicker, but slightly clearer pixels.
If you want to remove flicker, you need a flicker fixer (For interlaced modes) or a scandoubler (for all modes) and a monitor or LCD TV. I think the Indivision ECS should work...?
