Adding an image above "Who Is Online"

[Jaruzzu]

Hi everyone! I am trying to incorporate an ad above the "Who Is Online" section near the bottom of my forum, but I cannot find where the coding is. Can someone assist me with locating which file I should be editing so that an image will appear above the "Who Is Online" section?

Edit: Basically I want it to look like this: http://i.imgur.com/TrMr1GZ.jpg

I am using the style we_clearblue, and it's running version 3.0.13-PL1.

This is my forum: http://thedarkdemon.com/index.php

Any assistance with this would be greatly appreciated.

[Lumpy Burgertushie]

index_body.html