[evenmonkeys]

That's in the navbar. You can have it two ways... You can either have the banner as a background so it displays behind the breadcrumbs, or you can have it to the right of the breadcrumbs.

Styles & Templates > Style Manager > Navigation/Breadcrumb > navbar

To have it as a background:

FIND:

<td class="alt1" width="100%">
<if condition="is_array($navbits)">

REPLACE WITH:

<td background src="image_url_here" class="alt1" width="100%">
<if condition="is_array($navbits)">

Replace image_url_here with the link to your banner.

To have it to the right of your breadcrumb:

FIND:

 <else />
<div class="navbar" style="font-size:10pt"><a href="$vboptions[forumhome].php$session[sessionurl_q]" accesskey="1"><img class="inlineimg" src="$stylevar[imgdir_misc]/navbits_start.gif" alt="" border="0" /></a> <strong>$vboptions[bbtitle]</strong></div>
</if>
</td>

ADD BELOW:

 <!-- banner hack thinger -->
<td class="alt1" valign="top" nowrap="nowrap">
<img src="" height="40" width="420">
</div>
</td>
<!-- // banner hack thinger -->

Just add in the actual link, height, and width.

How's that for ya? Good? Good. No? Oh well. Yarub tried.