This little class gives you the opportunity to have two different event handlers for the single Click and for the double Click on a MovieClip Instance.
The only thing you have to do is to link this class to a movie,
To do this, right-click on the movie in library, choose LINKAGE, mark the first check, and write the linkage identifier and the class you want to assign to, according to the image down.

Once you've done this, in the code view, you can use the two new events available, onSingleClick and onDoubleClick.

_root.yourMovie_mc.onSingleClick() {
  // ...  insert your code here.....
_root.yourMovie_mc.onDoubleClick() {
    // ...insert your code here...

The only thing you don't have to do is to rewrite the onRelease event.
If you need to use it, you can refer to the onSingleClick event.
The onPress event is still available for every use.
The classFile must reside in the same directory where your FLA is placed.