The Slide Show script is a FLA file (source code included) that reads the images/SWF files from a server directory and starts the show after a certain number of images is loaded.
You specify the number of images to load before the show starts, you can adjust the speed of the percentage preloader (so your percentages will be displayed smoother to the user) and you can customize each graphic element (for example the image Movie Clip Border and the percentage preloader and you can place the elements at any location inside your movie).
