This hack allows you to place an image with/without a link for each forum you create. (Possible different image w/ different link per forum) There is a bit of code you place in a template to make the image appear where you want it to.
The EX:
With some more hacking I could make it were there are 5 different images w/ links you can place per forum.
There would be 5 bit of code for the 5 images you want to show up when a forum loads.
Current Hack w/ 1 image
http://www.gzhq.net/forums/forumdisplay.php?f=118
(with image and link - Hellfire Empire Image)
http://www.gzhq.net/forums/forumdisplay.php?f=23
(without image and link)