one page responsive template - lightbox not working

Hi,
I was hoping someone could help me with applying a lightbox to portfolio images. It seems the images are placed through CSS and not embedded on the page. There is an image rollover CSS rule but the template wasn’t finished with the lightbox.

I want it to look something like this - simple image box:
http://www.templatemo.com/templates/templatemo_406_flex/

This is the site I’m working on:
http://wswdesign.com

Thank you graciously for any help.

The images under “latest work” are embedded the ones under “portfolio” are added through CSS and don’t show on the page until going live.