ActionScript 3.0 :: Communication Between Objects That Are Parts Of 2 Components?

I've posted my question on other forum but without success so I couraged myself to ask here too. I've got an application (see image) which consists mainly from two different components. It is media player similar to winamp or so. Two main components are MainPanel and second one Playlist. These contain several other components so MainPanel constains Buttons objects TimeCounter or TrackDescriptionWidnow etc. and Playlist contains AlbumNext AlbumPrev buttons, Display which holds Textfields with names of tracks. So the thing which is most complicated is actually communicatig between some objects. Let's say I click on the track in the Playlist. In fact many objects need data when other one changes its state. When I click NextTrackButton in MainPanel, next songName displayed in the Playlist needs to shine, or if the ShuffleButton is pressed one of the random song will be played. My question is how to communicate between objects that are not in the propagation scope when events occur For example if some object fire an event in the playlist(Component2) only objects that come from Stage through Engine can listen for that event. So objects in MainPanel can not hear dispatched event. I've got many events, many objects listening for some of them, and I ended up with the total mess who is listening for. I register events to my class by public static const EVENT_NAME; and then dispatch it on that occured situtation. I managed to add some events listener to Engine and set bubbling to true, this way Engine can listen for most of the events, but then I have to dispatc new event to the other component to make it listening. Do you know how to communicate properly between differently scoped objects?