I might try putting large sheets of bubble wrap and then film over the entire frame and windowsill for the windows in my room. I can live without window sills for a while. Plus, I haven't recently painted the window frames in my room. Painting is on my to do list but I can wait until summer to do that. In the event of an emergency, I could just pull the film and wrap right off.
I may have to try the film on a separate wood frame method in my son's room. I don't want to damage the paint by sticking the film to the frame directly.
Sand noodles might really help too. I could make those from some thrift store fabric. A trip to my favorite local thrift store is a must for this weekend! There is a really big fabric and sewing section. I bet I could find some drapes and sturdy curtain rods, hooks and rings too. As a nice bonus, all purchases benefit a local, non-profit shelter for abused women and their children.
Thanks for the great ideas. 
BTW, Here's a link to DIY durable and affordable exterior storm windows:
http://www.motherearthnews.com/Modern-Homesteading/1977-11-01/Low-Cost-Storm-Windows.aspx
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