It is good that you have to set only a directory and not any single files path for make a Slide Show.
Very simple the setting.
Why Not 5 stars? I can find instruction about caption and descripition: there is a demo on site, but i can't set Caption&Descripion for more that one graphis (the first). I'm sure that the setting need a symbol for indicate the new "line" but i can find it.
Tested on 2.5.x and two sites
Thanks for the review. We would be glad to help you figure out the captions and descriptions if you are having trouble. Just ask :)
The demo page for this extension will show how how to set it up properly.