Adding movieclips with a class?

At the moment I am working this way. I have a movieclip (myMovieclip_mc) that need to be moved around, off and on the stage.

At present I add the movieClip on the main timeline then use the class to manipulate it. However is it possible (or even efficient) to use the class to do the whole thing? I suppose I would have to send a variable name to the class and then get it to add the child to the stage.

If someone could do a simple example it would be much appreciated.