I can't believe I forgot to post this - I wrote it but just now found it in my Drafts so guess I didn't share.
Our MDS challenge last week was to use one photo with multiple photo boxes.
Here is mine:
What you need to do for this effect is:
•Create the number of photo boxes you want (create one and copy and paste)
•Group the photo boxes
•Apply drop shadow and mat
•Drag and drop photo into the boxes - they should all turn blue.
Here is a video by Heather Summers - http://www.youtube.com/watch