This program assumes that you have a folder of image files (jpg, etc.) that you want to show as a slideshow. This program also assumes that those images all have the same dimensions.
The program assumes images that are 320x240 pixels. If you want to use another size, you should change the dimensions of the jit.qt.movie objects and the size of the jit.window. Images that do not have a 4:3 aspect ratio will get distorted when shown fullscreen, unless some adjustments are made.