If you want to make a custom slide show, you might look into "Photo-To-Movie" which has versions for both Windows and MAC.
It allows you to move around apicture in multiple directions, add titles, music, etc. You can export the pictures as AVI, MOV, high definition, 16:9, etc.
You can add a string of pictures to create a small movie. You can download a demo version to try it out before you buy it.
I make wedding movies using still pictures and inserting audio that I record during the wedding. It provides a different kind of creative control in telling a story.
Here is a link
http://www.lqgraphics.com/software/phototomovie.php