See if this is what you want. Before you run it, configure the frum headings at the top. I added a /forum.tree to show you how you can navigate the forum. Use /forum.setup to setup the first run. It will then save to forum.hsh every modification to the post. I'm going to work on a channel-driven version of the forum so users can use commands to post and nav the forums.
forum.mrc 
