I have a movie maker, I'll see if I can help you
![Smile](images/smilies/d_smile.gif)
Look at this picture:
![Photo Sharing and Video Hosting at Photobucket](http://i44.photobucket.com/albums/f6/IAmCrazyPsycho/MovieMaker.jpg)
Import any video, then drag it the timeline Video (if the video has sound in it, there will be Audio it it too) right click -> mute, this should remove the sound from the movie
Now just choose the music you want, 'import into Collections' then drag it in Audio/Music
Does this help?