This works for me on my board. My template is the default with your image added.
HTML Code:
<tbody>
<tr>
<td class="tcat" colspan="<if condition="$vboptions[showmoderatorcolumn]">6<else />5</if>">
<if condition="$childforumbits">
<a style="float:$stylevar[right]" href="#top" onclick="return toggle_collapse('forumbit_$forumid')"><img id="collapseimg_forumbit_$forumid" src="$stylevar[imgdir_button]/collapse_tcat{$collapseimg_forumid}.gif" alt="" border="0" /></a>
</if>
<a href="forumdisplay.php?$session[sessionurl]f=$forum[forumid]">$forum[title]</a>
<if condition="$show['forumdescription']"><div class="smallfont">$forum[description]</div></if>
<if condition="$show['subforums']"><div class="smallfont"><strong>$vbphrase[subforums]</strong>: $forum[subforums]</div></if>
</td>
</tr>
</tbody>
<if condition="$childforumbits">
<tbody id="collapseobj_forumbit_$forumid" style="{$collapseobj_forumid}">
$childforumbits
<!-----Start bottom table----->
<table border="0" width="100%" cellpadding="0" cellspacing="0">
<tr>
<td width="100%"><img src="http://www.rodentswithattitude.co.uk/forum/images/misc/background_categorybar.jpg" alt="" width="100%" height="28" border="0"></td>
</tr>
</table>
<!-----End bottom table----->
</tbody>
</if>