Fix to that is simple
Undo the Template Modifcations Above.
Now, goto the bottom of the "Header" Template and add the second line;
Code:
<center><a href="<if condition="$ban['url']">$ban[url]<else />$vboptions[forumhome].php$session[sessionurl_q]</if>" target="_blank">$banner</a></center>
This will add the banner below your Forum Logo.
I opted to have my banners left justified, so I'm using <left> rather than <center>