Anyone know how to modify this php file?

I’m using the lightbox balupton plugin – http://wordpress.org/extend/plugins/jquery-lightbox-balupton-edition/

It works great, but it loads the javascript on every single page instead of just the specific pages that use this lightbox. The main file in this plugin is a ‘jquery-lightbox.php’ file which has this code:

<?php

if (!class_exists("jQueryLightbox")) {

  class jQueryLightbox {

    function jQueryLightbox()

    {

      if (is_admin() || !function_exists('plugins_url')) return;

      global $wp_version;

      $path = plugins_url('/jquery-lightbox-balupton-edition/js/');

      if (version_compare($wp_version, '2.8', '<')) {

        wp_deregister_script('jquery');

        wp_enqueue_script('jquery', $path.'jquery-1.3.2.min.js', false, '1.3.2');

      }

      wp_enqueue_script('jquery-lightbox', $path.'jquery.lightbox.min.js?ie6_upgrade=false&auto_resize=false', array('jquery'), '1.3.7');

      wp_enqueue_script('jquery-lightbox-plugin', $path.'jquery.lightbox.plugin.min.js', array('jquery', 'jquery-lightbox'), '1.0');

      add_filter('attachment_link', array(&$this, 'FixLink'), 10, 2);

    }

    function FixLink() {

      $post = get_post($id);

      if (substr($post->post_mime_type, 0, 6) == 'image/')

        return wp_get_attachment_url($id);

      else

        return $link;

    }

  }

}

if (class_exists("jQueryLightbox")) {

  //$jQueryLightbox = new jQueryLightbox();

  add_action('plugins_loaded', create_function('', 'global $jQueryLightbox; $jQueryLightbox = new jQueryLightbox();'));

}

?>

Anyone know how to modify this file in order to make the javascript load only on the pages I want it to?