Matching slide duration to audio within a chapter

I’m creating a slide show with multiple chapters, each using a separate audio track. I’d like to have FotoMagico automatically match the duration of the set of images within each chapter to the length of the audio track I’m using for that chapter. I can’t figure out how to do this for a selected subset set of images and the selected audio track. Also, it seems that if I cut the audio track to end before the actual end of that track, FotoMagico won’t automatically match the slide duration to the abbreviated audio length, only the entire audio track. Is there a way to accomplish these two ends?

(1) Match a selected set of slides to a particular audio
(2) Match the selected set of slide to part of the audio, not the entire track