I already have a WinTV-GO PCI card which only has inputs, I had bought it to capture and watch TV on my pc on a small screen, now that I wish to do the opposite which is to see whatever's going on on my pc's screen on the TV, my research into this shows that I need a PCI video/graphics card that has an "S-Video Out" for this to happen, if I were to go now and buy another card that has this output , what I would like to know is, can I install "2" video cards? Or would that cause any conflicts/problems?
Your WinTVGo is not a video card. You would replace your current video card with the new one. If you have onboard video, check in the manual on how to disable it.
This is the cheapest good card I have found with an S-Video output, is this ok? Radeon 7000 http://www.dealtime.com/xPF-ATI
The Radeon 7000 is OK. A little slow by today's standards. You would be much better off with a Radeon 9000/9200 etc, or a GeForce 4 Ti/MX series.
You can ran two video cards at the same time.My buddy has an AGP and and a PCI card and runs two monitors on the same computer.Just make sure to have them both enabled in the device manager.