Drag and drop to open link

Hi , I'm learning flash and have just upgraded from MX to CS5 . In MX I created a drag and drop actionscript that works fine , but now I want to modify it. In the original , an image representing an audio file could be dragged and dropped , and if it was double-clicked it opened that specific audio file and played the audio . I would like to get rid of the double-click and have the audio file open if the image is dropped on top of another image (of a record player) . Is it possible to activate the specific link for the audio file image by dropping it inside a box , or onto a button?

Also , the MX version works fine , but do I have to rewrite it using Actionscript 3 , if I add further code in CS5?

Thanks