I'm new to the Flash environment and actionscript, and I've been having trouble figuring out how to display a real progress bar for a file upload. The problem i

I'm new to the Flash environment and actionscript, and I've been having trouble figuring out how to display a real progress bar for a file upload. The problem is that the file is not a local file on the user's machine -- it's a file that's created within the swf (specifically, an image file). Any as3 hackers know of a way to poll the progress of an upload like this? It's a URLRequest with the raw image packed into the data property, sent through a URLLoader.