Last night we played a benefit show for the Army. They had a lap top PC that feed a signal to a projector that showed on a white backdrop behind the stage. This gave me a few ideas of doing the same. I know others have done this before. But what do we need to do this in bars/clubs that are small etc. What equipment ideas etc. The main problem I can think of is it would have to be setup far enough from the stage. But then the projector will have to be up higher so it doesnt shine onto the backs of peoples heads in the crowd etc. Ideas?