Forums Scripts & Popups add item in channel nicklist

I want to add an item in the nicklist on the right of a mIRC chat window, is this possible?
I want to add the number of persons online in that channel, I know how to get this number, it's with $nick(#,0).
The problem is I don't know how to list it after the nicks, even not if it is possible.
If it is not possible from within mIRC, maybe there's a dll?