See these instructions for using Windows Movie Maker to import, edit and combine .avi or .mpeg video clips or photos: http://www.microsoft.com/windowsxp/using/moviemaker/create/1stmovie.mspx
After opening the program you simply import (make sure your video is an .avi or .mpeg file), then use the window on the right to clip and drag your footage into the movie strip at the bottom. You can easily add titles and then save your movie.
