Adding "Next" and "Previous" Button

Love the plugin! But is there a way to add a “next” and “previous” option, so visitors can click through the gallery without having to select a thumbnail each time they want to see another photo? Ideally, I’d like it to appear underneath the thumbnails.

The page I’m talking about specifically is: http://www.calliemanionphotography.com/maternity/

Thank you so much!

http://wordpress.org/plugins/super-zoom-gallery/