spiders.php? I presume thats a mod you installed.. but anyway to add a link to your Navbar simply:
Admin Cp > Styles and Templates > Style Manager > YOUR STYLE > Edit Templates > Navigation / Breadcrumb Templates > navbar
then scroll down in the template to <tr align="center"> then paste the following in the area below:
<td class="vbmenu_control"><a href="spiders.php$session[sessionurl_q]">LINK NAME</a></td>