I'm definitely not a web developer, but I've hacked up an ./include/client/open.inc.php file to fit my purposes.
Basically, I added a combobox that allows the user to select their office location. This location is then appended via javascript to their full name once the form is submitted. ie. 'User Fullname (office locale)'
Not even close to implementing database additions, but it does allow me to get a little more information out of the user.
You may download it here if you wish: (http://www.hedratek.com/DL/myadd.zip)
Please don't take this as professional work. Think of it as the quiet desperation of an inept IT manager.