I just installed an electric screen made by Bretford (model 700). It was a free unit that I was able to salvage out of a demolition project. The screen is approx. 82" wide and 62" high....which is not in HDTV 16:9 format. What I want to do is add some blackout drop at the top so that I can get closer to the correct ratio of 16:9 (which would be 82" wide and only 46" high). How can I black out the top 16" of the screen? Some kind of paint? Some kind of black out material? Anyone ever heard of a way to tackle this issue? Thanks.