Upload all to /wp-content/plugins/highslide

include the following in the head:


<!-- Highslide Plugin --> 

 <script type="text/javascript" src="/wp-content/plugins/highslide/highslide-with-gallery.js"></script>
 <script type="text/javascript" src="/wp-content/plugins/highslide/highslide.config.js" charset="utf-8"></script> 
<link rel="stylesheet" type="text/css" href="/wp-content/plugins/highslide/highslide.css" />