I am trying to view two monitors using 1 PC to 2 VGA SVGA Monitor Y Splitter Cable. All the 2nd monitor does is show a duplicate picture of what my default monitor shows. But that's not what I want, I want to use the additional monitor as an extension to my default. I had that at my old job and it was easier to view more files and pages at the same time because I could just have some open on my default, and than different ones open in the additional one.

Windows supports multiple monitors with certain video cards and your video card and its driver/utility software may itself if the hardware offers the feature. Using Multiple Monitors with Windows XP discusses the Windows option as well as others. If you are using an operating system other than Windows, post back.