| When you make curtains, you use double the width of the window, so I'd figure you'll need that at least. You might just do swags at front and back entrances. And a gathered layer over the middle. There are battery-powered lights
http://www.save-on-crafts.com/led2.html Slip silk-flower-style vines among the folds of the fabric. Use cable ties (zip ties) to attach at places. Do a search at http://images.google.com on "arbor+tulle" and see what you get for inspiration. | 
