How to pop-up a data-bound image full-scale in RB 3.0

I've built a Report Builder 3.0 report and it contains data-bound images in one of the report columns (I followed the steps outlined inhttp://technet.microsoft.com/en-us/library/dd239367(v=sql.105).aspx and it worked great).

The data-bound images embedded in the report are basically sized as thumbnails.  This is great, but I also need users to be able to see a full-size rendering of the image (either by hovering over it or by clicking on it).  If these were EXTERNAL images, I would simply create an action that contained a link to the image file.  How do I accomplish this for data-bound images?

Thanks.

-tom