create a new movieclip with the small image in frame one and the larger image in frame 2. attach a stop() to frame 1.
Thanks. If I want to show both the small image and the large image at the same time though. I'm guessing I will have to duplicate the MC? This seems slightly memory inefficient as I'm assuming all frames of a MC are loaded into memory before they are actually needed
add frames to a new movieclip that contain whatever you want to display. if you want to display the small image alone, the small and large together and the large alone, create 3 frames in that movieclip. then export as a swf and whenever you want to display one of the frame of that swf, load it and use a goto (after loading is complete).
i don't see any inefficiency unless it's possible you won't want to use all frames of, for example, the eyes movieclip. in that case, continue to do what you're doing - create a swf for a small part and a swf for a large part. only load the size/part if needed.