How to put a thread into a link to another thread.

[carubmun]

I have two threads that are the same thing.
Both in very different parts of the site.
The original thread was used for one subsection of the forum and its been a favorite thread for them for a while.
I recently decided to expand that thread by making another one in the main area of the forums.
I would like the guys that used to post in the original thread to now post in the new thread, but they are set in their ways... they like having that thread in their own forum to post in.

So what i want to do is allow them to have that thread visible in their forum, but have it re-direct them to the thread in the main forum.

Is that possible?