MyBB Community Forums

I am using this ChangUonDyU - Extra File Chatbox version 3.6.0

http://community.mybb.com/thread-63559.html

Once installed.

Modify your templates like index, showthread, forumthread, etc.
And add this anywhere you want your shoutbox be shown:

{$changfcb} 

add to footer template code

{code shoutbox}