Are you using an Nvidia or ATI card? Either should have something along the lines of a control panel, either in the desktop context menu or under programs->company. Once you get in there, tinker. You'll probably need to use advanced/per program options.
Life is pleasant. Death is peaceful. It's the transition that's troublesome. - Isaac Asimov
Vertical Synchronization doesn't cap your framerate at your refresh rate. It forces frame buffering to be synchronized to your framerate. This should prevent screen tearing from being possible, because you can't ever have a new frame load while in the middle of a refresh. If you're just trying to get rid of screen tearing, V-Sync should already do that.