Phpbb: Any FREE Ad-on script for unlimit

[fastbuilder]

I am looking for add on script to have phpbb has an unlimited sub category more than one depth.

Hope some one could tell me if there a FREE resource for it.

[wheeler]

I haven't heard of anything that would do this, but I reckon http://www.phpbb.com/mods/ would be a good place to start looking. "Mod" would be the correct keyword to search for in search engines as well