oh i can stretch across monitors already.
have no probs (set my ati dual screen to stretch mode)
what im trying to do is to basically move my game screen onto one monitor and have the other black.
(stretch my screen to 1024 X 1536)
move my "world" to 1024 X 768 (half the stretched screen) and have the blackness on my second monitor where i can put custom ui components.