[TheMilkCarton]

It might be nice to add support for "$forum['parentid']".. Maybe the way you've done this already achieves this, but what I'm referring to is allowing all forums under one category ID to have a different icon than all the forums under another category ID.

This would help a lot so that people don't have to type out every single forum id if they want their different categories to have different icons. It also helps when adding new child forums, this way you don't have to go into the settings and add a new ID every time.