I have been looking for a way of adding lightBox support for the tantan flickr wordpress pluggin, but had no luck. I did find these instructions but they did not work for me
I did however work out a nice easy way of doing it..
1) Open your widget-display.html file.
2) find the following lines
<a href="<?php echo $photoURL ?>"><img src="<?php echo $photo['sizes']['Square']['source']?>" width="<?php echo $photo['sizes']['Square']['width']?>" height="<?php echo $photo['sizes']['Square']['height']?>" alt="<?php echo htmlentities($photo['title'], ENT_QUOTES, 'UTF-8')?>" /></a>
3) Delete them and replace them with
<?php echo TanTanFlickrDisplay::photo($photo, array('size' => 'Square','album' => $album)); ?>