Hi, you may belive or not, if your problem is still there after you tried every driver/setting you could ever imagine, then it could be hardware related. Go here http://camp0s.altervista.org/sVideo/sVideo.htm i've put toghether a working SOLUTION, free, lot's of image, explanation and you can do it by yourself (or by your techy friend).
Hope this could help you.
Cheers,
Camp0s.