How do I create a preloader?
To build your preloader simply click Behaviors Panel > PlugFactory > One-Click Preloader. Done.
If you do not have the Behaviors panel open you can find it at: Window>Development Panels>Behaviors (or click shift F3). Click on the "+" sign in the top left corner of the Behaviors panel to access your behaviors. Then choose PlugFactory>One-Click Preloader. The behavior will place all of the necessary code in frame 1 of your movie. When preloading has completed the One-Click Preloader will destroy itself then go to frame 2 for you to take control.