Each of your forums will have an id number and you are able to create 'conditions' that will use that id number. So, if you have a logo at the top, you could do something like:
HTML Code:
<if condition="$forumid == '1'">
show logo for forumid 1
</if>
There are also modifications to show different banners/logos/headers for each forum also.
Is that the information you were looking for?