Hey ive got the card Nvidea geforce 6200 with latest drivers, i record my screen using my tv card with a s video cable plugged into graphics card and a screen recording program to catch online game play e.g games like call of duty etc. Ive been getting a black boarder around the outside of the video when i preview the captured video, ive been advised to enable overscan with my graphics card....how do i do this?