Maybe this information is missed in the included readme.txt file but there is one banner ad in the file called categorydetail.php which shows a Adbrite banner.

If you want to show it with your own Adbrite ID you have to replace the following code with your own one:

  a href="http://www.adbrite.com/mb/landing_both.php?spid=80528&afb=468x60-3"> img src="http://files.adbrite.com/mb/images/468x60-3.gif" border="0">

You also can replace the code with any other banner code you like or add your adsense code for a

468x60 ad if you prefer this.