How to convert Stage to Stage3D accel. gfx?

Can someone show me, if possible, an easy method to convert pre-stage3D code to stage3D accelerated-graphics compatible code?  

Can you simply just create an instance of stage3D, and by adding an older, non-stage3D 'entity', thereby accelerating it's graphics, or does it need to be hardcoded every time (without an engine like away3d4.0)?

anyone wanna show me?  ;)

ActionScript3 source code

/**
 * Copyright bradsedito ( http://wonderfl.net/user/bradsedito )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/faod
 */

package {
    import flash.display.Sprite;
    public class FlashTest extends Sprite {
        public function FlashTest() {
            // write as3 code here..
            
        }
    }
}