Using Adobe Flash CS5.
Created a 1mb (.swf) presentation (images, transitions, voice-over, etc).
Used the Preloader for SWF template from Flash CS5 library.
Copied the code into its own layer called "AS3" into frame 1.
Copied the little text box with instance name percent_txt into frame 1.
Everything else starts in frame 2.
The profiler still reads about 300kb in the first frame and it takes until about 50% (about 20 seconds at 56kb dl) until the simple image I put on frame 1 appears.
I read on a forum something about "exporting about 1mb of assets in your first frame", but I don't understand what that means...