One of the great legacies of Multimedia Shooter was the video tutorials Rich Hernandez had available.
Here is a link to one of them, where he shows you how to use Soundslides Plus. (Quicktime - warning, when I played it, the audio was out of synch with the video about halfway in. But not so that you can't follow it.)
(Here's the link to the Soundslides site, one of the great programs.)