I have read the code and it is obligatory to use 3 images, you can see it uses three variables:
$.galleryUtility.centerImage = {};
$.galleryUtility.rightImage = {};
$.galleryUtility.leftImage = {};
I suggests you use something more elaborated like jquery cycle plugin, I don't know if you can find sth that adapts to your needs. Pls look here there is some good stuff:
http://jquery.malsup.com/cycle/more.html?v2.23
Edited:
Look at the following articles, there are many options, I am not sure there is sth similar anyway:
http://speckyboy.com/2009/06/03/15-amazing-jquery-image-galleryslideshow-plugins-and-tutorials/
http://www.1stwebdesigner.com/resources/57-free-image-gallery-slideshow-and-lightbox-solutions/
I think you can tune the following galleries to do sth similar:
http://www.no-margin-for-errors.com/projects/prettyGallery/
http://sorgalla.com/projects/jcarousel/examples/static_multiple.html
Using scriptacolous, you have:
http://www.puidokas.com/portfolio/frogjs/