[amykhar]

You can do this with condtionals. It's pretty easy too. Create a folder for your images. Name them as follows - forum1.gif forum2.gif etc.

The only condition is that each image must be named with the forumid in the title and each image must be the same type - gif, png, or jpg.

Then, in your level 2 post template, you change the link to use your image instead of the text.

If you want it for only certain forums, the conditionals are more complex, but still doable.