[Lynne]

If you had a directory, say /images/banners and in it you had things like banner1.png and banner2.png for forumid 1 and forumid2, you could do something like:

<if condition="$foruminfo[forumid] == 1">
<img src="/images/banners/forum1.png" alt="$foruminfo[title_clean]" width="x" height="y">
</if>
<if condition="$foruminfo[forumid] == 2">
<img src="/images/banners/forum2.png" alt="$foruminfo[title_clean]" width="x" height="y">
</if>

Something like that in the template for the banner. You can play with that by making a new style that is not pickable by users. You as an admin can see the new style by clicking on the style name in the Style Manager. It's just something to play with when you feel like it. (You could also do it as a plugin, but the template edit is the easiest.)