"screenshot" with bitmapData.draw and fileReference.save?

I made this dress-up type game, and have been trying to figure out how to let the user save an image of their creation.

I've been researching and figured out I need to use bitmapData.draw and fileReference.save in the actionscript somewhere.

The only problem is I want this to be a standalone .swf if possible. The 'game' is here.

This is part of my code:

saveMe.addEventListener(MouseEvent.CLICK, saveChar);

function saveChar(evt:MouseEvent) {

     //what goes here? help please!

}

saveMe is the movieclip 'button' the user clicks on to launch the save dialog.