hi i had trouble with this myself but i got it working in the end on my site as you can see here under the image tab http://ukppgwebstore.com/ppg-niviuk-link-11277-p.asp. i have looked at your code and you are missing a link to the java script file "clearbox.js" which you will need to upload to your site

i pasted my link

<script src="http://ukppgwebstore.com/ekmps/shops/ukppg/resources/Other/clearbox.js" type="text/javascript"></script>

into your source code in dreamweaver and  it worked straight away. Below  is a section of your code to see how it looks now. try it for yourself with my link to get it working and then change the address to your clearbox.js script there are also links in the clearbox.js script you may need to change. if you need more help let me know and together we will make it work with all the files hosted from your own site its a great widget and worth the effort.

here i have it working with video

http://ukppgwebstore.com/kangook-paramotors-616-c.asp

// EndWebWidget lightbox_gallery

        </script>

      </div>

    </div>

    <div id="line_3"></div>

    <div id="Rotator_Contain">

      <p>

       <script src="http://ukppgwebstore.com/ekmps/shops/ukppg/resources/Other/clearbox.js" type="text/javascript"></script>

        <script type="text/javascript">

// BeginOAWidget_Instance_2648024: #OAWidget

/*

      //     ClearBox Config File (JavaScript)

      */

      var

      // CB layout:

      CB_MinWidth=300,                // minimum (only at images) or initial width of CB window

      CB_MinHeight=300,                // initial heigth of CB window

      CB_WinPadd=15,                    // padding of the CB window from sides of the browser

      CB_ImgBorder=3,                    // border size around the picture in CB window

      CB_ImgBorderColor='#FFF',            // border color around the picture in CB window

      CB_Padd=4,                    // padding around inside the CB window