Yeah... Movie Maker is the bane of all existence. I use Final Cut Pro ($$$) and Adobe Premiere Pro ($$)... yet, I DO think Movie Maker can be used for photo slideshows.... takes too long in Premiere or otherwise. Just search for "Video Editing Open Source" and see what you have. The trouble with Windows Movie Maker is your video drivers and such play a big part. There is TOO much room for error.
