I know its possible to save an object (and all subclasses, arrays, strings) into a Flash LSO, locally to a user's computer.
Is it possible to save a MovieClip or a Function?
I tried once with MovieClips, but it just stored the reference (pointer) to the MovieClip into the LSO and therefore it was unable to retrieve the whole MovieClip binary data back again.
It is not possible to "copy" and by that not to save objects that inherit from displayObject.
the best solution is to extract the bitmap data save that and write your own parser for saving data that shapes the movieclip. other than that i didn't found any solution