Im currently creating a map editor for a game Im creating which is going very well

What would help though is a function which works in the same way as duplicateMovieClip. I can copy single Sprites fine, but if I have for example created a new Sprite which contains two different Sprites, I cant make a copy of that new Sprite. Has any one found on their blog reading travels a function/class which truly emulates duplicateMovieClip?