Not unless someone comes up with a board hack, which John is happy with and I can work with, to make this a profile item, i.e. adds it to the profile fields you can edit yourself, but allows administrator to override with the setting in the administration console. With the board functioning as it is now I'm saying no.
There are several of these available already. I found a couple just now:
http://www.phpbbhacks.com/download/427 - Custom User Rank
http://www.phpbbhacks.com/download/1178 - Custom Title Hack
Basically the same thing it sounds like, though the second one might be a little more configurable.
Or, you could do even better and install several popular hacks which will result in many cool features (such as username text effects: font color change, shadows, etc.) in addition to the custom title. Basically this is all done through a user "shop" hack. The shop allows users to purchase these special features (custom title, username color/shadow/etc changes, and so on). The special features are purchased with points that are gained from posting-- these points are here by first installing the Cash Hack, which is extremely popular (and tons of other cool hacks require this to be first installed).
Here's the cash hack:
http://phpbbhacks.com/download/2036Here's a nice shop hack:
http://www.phpbbhacks.com/download/967The shop hack also allows you to create "items" which are shown up in the inventory in the profile- adds a nice RPG feel, but it's a matter of personal opinion whether one would like to create items or not.. I used to have this installed and it's pretty cool but I don't think the text effects really worked.. anyway you guys would probably just use this for the effects.[/list]