How to set up variable to load external image in AS3 for a drag & drop object?

I would like to know how to set up the URLRequest to load an external image to a movie clip that is being used in a Drag and Drop event.

I have successfully implemented the drag & drop code to my design but I would like to improve it by successfully loading external images to those objects that are being dragged around.

I am trying to figure out how to combine them.

I would really appreciate you help.

Thanks.