[enepx]

я понял задачу так, может и не верно:

Main:

public class Main extends Sprite 
{
	public function Main() {
		var objectOne:ClassOne = new ClassOne();
		var objectTwo:ClassTwo = new ClassTwo(objectOne);
		
		var sampleEvent:Event = new Event(Event.OPEN);
		objectOne.generateEvent(sampleEvent);
	}
}

ClassOne:

public class ClassOne extends EventDispatcher
{
	public function generateEvent(event:Event):void {
		dispatchEvent(event);
	}
}

ClassTwo:

public class ClassTwo 
{
	public function ClassTwo(classOneRef:ClassOne) {
		classOneRef.addEventListener(Event.OPEN, onEventReceive);
	}
	
	private function onEventReceive(event:Event):void {
		trace(event);
	}
}