AdminCP usergroup organization?

[Wizzup]

Hello,

So right now on my forums I have the different usergroups organized by adding a prefix to their title. ie:

Rank - Administrators
Rank - Members
Cup - Valued Voter
Status - Miserable

(Cups are rewards)

So because the usergroup list is displayed alphabetically, doing this groups the usergroups of the same type together. The problem with this now is with some mods like VSa 's who was online in last X hours, it shows the rank legend as the "Rank - Administrators"

I could not find a mod that would do this some I'm just wondering if anyone had some guidance of how I could modify vBulletin to do the following:
- add a new field to the usergroup settings to add a category (ranks, cups, etc)
- adminCP would group by category and prepend a tag like [Rank] that is only visible in the AdminCP list

Thank you.