I am trying to create a slide show for a class presentation. I saw a slide show recently that I really liked that had different "sections" on the slide, each section containing its own photo with its own effects. For example, one photo would slide in/out and the other three stay in place, then it would switch slides and a new set of photos would come in and some would transition in and out. I am wondering if this effect is available in iMovie, iPhoto, or any other app on the Mac? If not, do you know of any slideshow software available that will be able to create this effect?