First, I must say I love the SITE!!
I been using 4 trees at my father in laws house for my drive-in, we can sit or I have the Ramsey fm transmitter for drive-in, we use it karaoke on too!!
Pictures are herehttp://www.surfpiggie.com/moviescreen/
And i use my Handicap DJ/Karaoke System as soundhttp://www.surfpiggie.com/plugyourears/handi/index.htm
Heads up Walmart is now selling inflatiable screens for 199.00, I just bought one today so now I will be really portable!!
this is the model they are sellinghttp://www.gemmy.com/product.cfm?productId=39121-32&subCatId=66&parent=32