Custom Header Graphics for a few boards

[nbost130]

On my forum www.crossconnectionym.org [nofollow] I have a few boards that I would like to be able to have custom graphics at the top of. 

Example:  Section about dogs would have a custom header that has a picture of a dog in it. 

Is there anyway to do this?  The only thing I could think of was to use a different theme for each one, which would be cumbersome.  When I tried this method I received the following error if I tried to view the board:

Fatal error: Cannot redeclare template_init() (previously declared in /home/...../public_html/forum/Sources/Load.php(1623) : eval()'d code:32) in /home/...../public_html/forum/Sources/Load.php(1623) : eval()'d code on line 57

Any ideas?

Thank you!