Windows Movie Maker Problem

Ok heres the story, I made a bunch of movies to throw up onto my website and I’m trying to put them all together as one big movie. Windows Movie Maker came with my computer so I used that and had some success, however I have a problem. Some of the clips are under a second and so they are recognized as pictures rather than movies. So I’m wondering if theres some way around that. Will I have to switch programs? If so which ones do you guys suggest?