lightbox.js の
	fileLoadingImage:        'images/loading.gif',     
	fileBottomNavCloseImage: 'images/closelabel.gif',
を
	fileLoadingImage:        'lightbox/images/loading.gif',     
	fileBottomNavCloseImage: 'lightbox/images/closelabel.gif',
に変更。


menu.html の
<script type="text/javascript" src="js/prototype.js"></script>
<script type="text/javascript" src="js/scriptaculous.js?load=effects,builder"></script>
<script type="text/javascript" src="js/lightbox.js"></script>
<link rel="stylesheet" href="css/lightbox.css" type="text/css" media="screen" />
を
<script type="text/javascript" src="lightbox/js/prototype.js"></script>
<script type="text/javascript" src="lightbox/js/scriptaculous.js?load=effects,builder"></script>
<script type="text/javascript" src="lightbox/js/lightbox.js"></script>
<link rel="stylesheet" href="lightbox/css/lightbox.css" type="text/css" media="screen" />
に変更