The software is just a free download you get from Windows when you update your XP SP2. It's called Windows Movie Maker 2.1. If you have Windows, just do a standard "Windows Update" from your Start menu. When it's finished, check your All Programs list and it should be there. It took me a couple of tries but I finally figured it out.
Thanks everyone! These are really fun to film. Living with the new puppy Rohde is really keeping 16-year-old Agnes young.