Posting instructions on New Thread, link to prefix index?

[Teresa]

In our main forum, we have about 10 very active forums and each forum will have around 20-30 possible thread prefixes.

Ideally, I'd like to put some instructions just above the thread prefix/title area in posting a new thread, that explains the posting rules. Ideally, I'd like a link to a new page or table or popup or something that shows them all of the prefixes, a) sorted by forum, and b) sorted by prefix, then showing the forum it belongs to.

This would help them see that a given topic actually belongs in a different forum.

I can't find an add-on for putting in any custom text/html just about the thread title.

And then, is there anything out there to dynamically present the prefixes? I can't find anything.