Ya know, I just now actually _thought_ about the plywood thing, and while I would absolutely use screws (or something more reusable)...I don't have anything to screw into for most of them. All my windows have metal frames and 10 of the 18 are in brick facade, and the ones that aren't are fairly well sheltered already, just from the way the house is built. I could do masonry anchors and the like, but...eurgh. PITA! I need new windows anyway, so let 'em break and let insurance buy new ones! (um. right. need to ponder this one, since I'm not thrilled by the prospect of a hurricane _in my house_.)