I haven't installed 4.3 yet, but I understand that I now have custom profile properties that I can create.  That's great!  However, I need to go one step further and use the info that they provide to help me automatically assign them to the correct security groups.  For example, I want to add the following questions:

What den are you in? <drop-down list>
Are you a leader of the den? <y/n>

If they answer that they are in den #2, but are not a leader then I want to automatically assign them to security group "Den #2 Users".  If they answer that they are a leader, then I want to assign them to the "Den #2 Leaders" security group.  I have DNN setup so that I have to approve every user account before it is activated, so being assigned to a wrong group isn't really a problem.  This is mostly to save me some time from having to look up the user on a roster and determining which den they are in and whether they are a leader.  Is there any way to add this type of functionality without modifying the core code?

Thanks!

Ian