AS3 code help with drag and drop quiz

I have a flash drag and drop quiz that i would like to add different images to correspond to the correct veribage when the users have dropped the folder.

I have the text working ok when the user drops the folder (i.e. "yes, that is correct!", I'm sorry, that's not correct.", "Congrats, you're finished!")

I don't know where to start and I was wondering if it was possible to add an image from the library to the stage when the corresponding text is displayed on the stage?

I have the AS3 code below that I'm using.

Thanks for help in advance!

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

var startX:Number;

var startY:Number;

var counter:Number = 0;

folder_mc.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);

folder_mc.addEventListener(MouseEvent.MOUSE_UP, dropIt);

folder2_mc.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);

folder2_mc.addEventListener(MouseEvent.MOUSE_UP, dropIt);

folder3_mc.addEventListener(MouseEvent.MOUSE_DOWN, pickUp);

folder3_mc.addEventListener(MouseEvent.MOUSE_UP, dropIt);

function pickUp(event:MouseEvent):void {

            event.target.startDrag(true);

            reply_txt.text = "";

            reply_txt2.text = "";

            event.target.parent.addChild(event.target);

            startX = event.target.x;

            startY = event.target.y;

}

function dropIt(event:MouseEvent):void {

            event.target.stopDrag();

            var myTargetName:String = "target" + event.target.name;

            var myTarget:DisplayObject = getChildByName(myTargetName);

            if (event.target.dropTarget != null && event.target.dropTarget.parent == myTarget){

                        reply_txt.text = "Yes, that's correct!";

                        reply_txt2.text = "Donec sed fermentum lorem. Suspendisse potenti. Pellentesque hendrerit tempor nunc, vitae semper risus gravida vel. Nam eu lorem sed nulla lacinia commodo vitae vel ante. Cras ac nibh dolor.";

                        event.target.removeEventListener(MouseEvent.MOUSE_DOWN, pickUp);

                        event.target.removeEventListener(MouseEvent.MOUSE_UP, dropIt);

                        event.target.buttonMode = false;

                        event.target.x = myTarget.x;

                        event.target.y = myTarget.y;

                        counter++;

            } else {

                        reply_txt.text = "I'm sorry, that's not correct.";  

                        reply_txt2.text = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Fusce a massa tellus, ut euismod urna. Phasellus bibendum pretium porta. Praesent sed elit vel odio ultrices dignissim in in tortor."

                        reply_txt3.text = "Try Again";

                        event.target.x = startX;

                        event.target.y = startY;

            }

            if(counter == 3

               ){

        reply_txt.text = "Congrats, you're finished!";

                        reply_txt2.text = "";

    }

}

folder_mc.buttonMode = true;

folder2_mc.buttonMode = true;

folder3_mc.buttonMode = true;