In the MiniBB under of nick, generally it has MEMBER, MODERATOR, ADMIN, etc.

How to place some users in a new group? I would like to place users in called group OLD MEMBERS or something it type..

I am Brazilian and I do not know to write in English! =P

Titles Admin, Moderator and Member are given automatically regarding their initial status. Despite that, you can give any of the forum's registered participants whatever title you find convenient. This is to be done in the file bb_specials.php, the option $userRanks=array();

Read about the user special ranking and its syntax HERE in the manual.

If you want to tie up the ranking with the number of posts, you can also use the solution Custom Ranking from the download section or download it from HERE.

And believe in love! :)

There is no advanced rankings configuration or something like that. It's miniBB and it is content-oriented, not "users titles"-oriented.

Here are some related topics:

Using bb_special's $userRanks

Usergroups