I have a site which displays large images. They are loaded dynamically, when a user selects a category. I have successfully created a progressbar for each image, but I would like to make the progressbar, a SWF file which can be updated based on the uploading image. I have looked everywhere, and the closest I have come to a solution is the Preloader explanations, but they are also very thin about how to update the SWF and what settings to use when compiling the SWF.