I hope this is the correct forum for this, (I'm not sure where else would be right)
I've created a phpBB addon page for configuring Admins (add, modify, delete etc) when using MySQL.
The page uses the session management from phpBB which means that only logged in users who have specified ranks can access the page (also uses the users selected theme etc).
piccy
Tested with phpBB 2.0.8 (may work with earlier versions but I suggest you update as well ;) )
/edit: New .zip
* correct installation instructions this time
* moved extra files to contrib (since they shouldn't be around in a working install really).
* tided some code up.