The leaky windows are on the second story and I don't do heights as between my bad balance and phobia would have me clinging to the ladder and praying. You should see me when I clean my grandmother's gutters. I am nearly gibbering with fear the whole time. I can manage it only because the thought of her trying and going splat it is worse than the thought of me going splat. I would have to hire someone not having any friend or family member handycrafty enough or no longer physically fit to ask. Better I do it myself and save my $ to get these suckers replaced.
I *HAVE* seen windows with plastic sheeting stapled around from the outside before, usually with thin strips of wood around the edges where it was stapled down. Now if your windows don't have a storm window you can wrap your screen with plastic sheeting taping down the corners and that should help. This isn't enough at my house as the connections aren't tight enough on the windows lacking storm windows so I will be trying more selfstick weather stripping and rope caulk instead to block the leaks around both the storm and inner windows.
Here is a webpage with instructions on bubble wrapping windows
http://www.builditsolar.com/Projects/Conservation/bubblewrap.htmThey estimate it doubles the insulation value of a single glazed window :) I am hoping an appliance store near by will have some they are willing to give me as a few sites I found talking about this suggested.