ActionScript 3.0 :: Build A EnterFrameManager Class?

I´m trying to build a EnterFrameManager class. I wonder what would be the best way of doing this.
 
I´ve thought of something like:
 
public class EnterFrameManager extends Shape {  private var instances_arr:Array = new Array()  public function EnterFrameManager()  {   addEventListener(Event.ENTER_FRAME, enterFrameListener);  }

[Code]....
 
Where each of the instances inside instances_arr would have an enterFrame public method that runs called from the EnterFrameManager object.