A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
Create a separate presentation for each of the cycling series of photos. Set it to loop until esc.
On your main presentation, insert the looped presentations as icons (Insert > Object > Create from File > Browse to [File Name] > Check Display as Icon (change icon name if you want an identifier) >OK). Insert one object/presentation on each slide from which you wish to launch the "series of photos." Once inserted, go to Animations > Custom Animation > Add Effect > Object Action Show.
You can either keep the icon on the slide (place it somewhere where it won't interfere with the rest of your presentation) and launch your pres by clicking on the icon or move the icon off the screen and set it to launch on a trigger click of another more actractive object.
Once the series of images is launched and you're ready to return to your main presentation just hit esc. and you'll return...
Sandy Johnson, Microsoft Office PowerPoint MVP