according to that site the coding is a bit old so maybe that is hampering things a bit.

this is what my veiw source says about the lightbos stuff in the same section you have your code:

<link rel="stylesheet" type="text/css" href="includes/templates/as-Gold/css/style_imagehover.css" />
<link rel="stylesheet" type="text/css" href="includes/templates/as-Gold/css/stylesheet.css" />
<link rel="stylesheet" type="text/css" href="includes/templates/as-Gold/css/stylesheet_css_buttons.css" />
<link rel="stylesheet" type="text/css" href="includes/templates/as-Gold/css/stylesheet_header_menu.css" />
<link rel="stylesheet" type="text/css" href="includes/templates/as-Gold/css/stylesheet_reward.css" />
<link rel="stylesheet" type="text/css" href="includes/templates/as-Gold/css/stylesheet_zen_lightbox.css" />
<link rel="stylesheet" type="text/css" media="print" href="includes/templates/as-Gold/css/print_stylesheet.css" />
<script type="text/javascript" src="includes/templates/as-Gold/jscript/jscript_imagehover.js"></script>
<script type="text/javascript" src="includes/templates/as-Gold/jscript/zen_lightbox_mootools_custom.js">


maybe substituting the js for lightbox where the one for the other one is might help...I really don't know since I try to recode and sometimes butcher instead...but other times it actually works.