Draggable area on movie too large?

Hello all! I wonder if anyone has a suggestion for this!
I have two draggable clips, each set to jump to the top when released, this works fine.
My issue is that the “draggable area” is larger than the imported images (since they are angled, & flash sets mc’s to square or rectangles) - Ive tried various masking ideas, no joy - trouble is that if I placed the clips too close together it becomes difficult to select the one the user wants (since I need to include four/five clips).

Here’s the link to the file, so you get the idea - http://www.palegallery.com/test.html

All suggestions welcome!

scotia :wink: