Video Card?

[Gforce]

So your current video card has an s-video and composite out? If that is true, run a cable from one of those outputs to a tv or monitor. Then boot up your computer. The second screen may not work yet. Right click on your desktop and click properties. Click on settings. It should now show 2 monitors in the display but one might be shadowed out. Click on that monitor. Then check the box that reads extends desktop to this monitor. Click apply then ok. The screens should flicker for a second and then both should come back on. My guess is this will work with your current setup.