Make a projection screen very quickly and very cheaply with TYVEK, a PVC pipe, rope, and plumbing pipe.
Step 1: Choose the size of screen you wish to make.
I started out thinking I'd do 16' x 9' then realized that was too large, so went with 9' x 7'. Remember you want a roughly 3:4 height to width ratio for most video formats.
unprinted tyvek might be better for rear projection.