Non so se intendi questo.
codice:
stop()
this.addEventListener(MouseEvent.MOUSE_DOWN, startDragging, true);
this.addEventListener(MouseEvent.MOUSE_UP, stopDragging, true);

function startDragging(evt:MouseEvent) {
evt.target.startDrag();
}

function stopDragging(evt:MouseEvent) {

if(evt.target==mc1){
    gotoAndStop(5)
}else if(evt.target==mc2){
    gotoAndStop(6)
}else if(evt.target==mc3){
    gotoAndStop(7)
}
evt.target.stopDrag();
}