I've researched Windows Movie Maker but haven't actually used it. These two sites are in my bookmarks:
This is the Microsoft How To site for Movie Maker:
http://www.microsoft.com/windowsxp/u...e/default.mspx
The next one is a tutorial that covers a lot of the basics. It's dated 2005, though, so it might not be up to date. It explains how to trim clips and how to add titles, too.
http://www.informit.com/articles/article.aspx?p=425381
I've launched Movie Maker, and down at the bottom of the left column menu there are Movie Making Tips for "How to Edit Clips" and "How to add titles, effects, transitions." That would be a good place to start.