Well if his video card had a TV-out he would probably make the connection that it is an output from thec omputer to the tv. If he was that stupid.. then I'm surprised he could register on the forums and then post.
Anyway, you need some kind of TV-out. There aren't many PCI cards that you can slap in that have a tv out, but they do exist. Your best bet is to use a video card with a tv-out. Any decent video card will have a tv out. I never buy a video card without VIVO (video in video out).