If you need an easy-to-use "true" drag and drop question application for training courses, check out this Captivate widget. "This amazing widget allows you to create engaging drag and drop questions using any image, caption, highlight box, button, or animation that you add to your Captivate stage."
You must have Captivate 4 or higher to create the interaction BUT you can incorporate the files that it creates in other training applications besides Captivate like Articulate Presenter ( as a web object).
Check it out: http://www.infosemantics.com.au/catalog/widgets/question/wdgt_dragAndDropLite_AS3
