Create new window in Air Application

<mx:WindowedApplication ...>
   <p:YourComponent ... />  <!-- by putting it in your own file you can reuse it -->
</mx:WindowedApplication>

<mx:Canvas ...>
   <!-- put the contents that's in WindowedApplication here -->

   <!-- add this block to your script block, and hook up a button/menu/whatever to
        invoke this function.  See how it creates a new instance of Window, adds a
        new instance of YourComponent (which is the guts of your app), and shows that.
    -->
   <mx:Script>
       private function createNewWindow() : void {
           var window : Window = new Window();
           var yourComponent : YourComponent = new YourComponent();
           // initialize yourComponent instance's properties

           window.addChild( yourComponent );
           window.width = 800;
           window.height = 600;
           window.open(true);
       }
   </mx:Script>
</mx:Canvas>