Users Online displayed on main page AND on individual forum indexes?

[KuraFire]

How can I make it so that, at the top of each forum index (where you would see an announcement - right above there, for instance, OR all the way at the bottom, but pref. at the top) it shows all the users and the number of guests that are currently browsing a thread on THAT particular forum?

This is done in UBB right here:

http://www.fantasy-freak.com/cgi-bin/ubb/ultimatebb.cgi <- normal "Who's Online" at the top;

http://www.fantasy-freak.com/cgi-bin...?ubb=forum&f=1 <- Who's Online at the top that applies to that forum ONLY!

I'm sorry if this has been hacked in the past already, I couldn't find it so I figured I'd just ask it.

Help greatly appreciated! ^_^