I was thinking of doing a kind of open air cinema thing - having a bunch of mates round and setting up a projector down in our paddock. I can get a good projector, surround amp and some speakers that i don't mind putting outside. But I don't know what to use as a projection screen. I've seen inflatable setups to hire but I'm a cheapskate. I'm thinking some kind of frame maybe with sheeting? Or I can borrow some huge (1.5 x 3 meter) polystyrene sheets and put say 5 of them on end? Anyone set up an outdoor cinema before? What did you watch?!