Does anyone here have experience with the Cataloger module for CMS MS?  If so, I have a question!! 

Can you help me figure out how to add a lightbox-type feature to my cataloger item images?  I have searched the forums over there, but I don't understand what I'm reading. 

Here's an example page where I need to use the feature:  http://tinyurl.com/r7hzap

And here's the template code for the item pages:

<div class="item_images"><div class="lgimage"><a href="{$items[numloop].image_src}" rel="lightbox"><img name="item_image" id="item_image" src="{$image_1_url}" alt="{$title}" title="{$title}" /></a></div>
</div>

<div class="item_thumbnails">
{section name=ind loop=$image_url_array}
<a href="javascript:repl('{$image_url_array[ind]}')"><img src="{$image_thumb_url_array[ind]}" title="{$title}" alt="{$title}" /></a>
{/section}
</div>

What I want is for people to be able to click on the large image and see the full size image in a lightbox type display.

Ideas?  TIA!