AS3 - Acessando Main.as de qualquer lugar

By: Zao on 19:26

public class Main extends Sprite {
    private static var _instance:Main;
    public static function get instance():Main { return _instance; }

    public function Main() {
        _instance = this;
       // etc...
    }

    // etc...
}

Assim você acessa sua Main

public class Other {
    public function Other() {
        Main.instance.usefulInstanceMethod();
    }
}

Fonte: http://stackoverflow.com/a/373591