TOPIC: approve/deny button

I am currently in the process of switching over from RSEvents to DT Register since it will work much better for our purposes. The one feature I would like to see in DT Register that is in RSEvents however is an Approve/Deny option for registrations. Especially if there was a way to allow site members to be auto approved and guests to have to wait for an admin to approve their registration. Once approved an email would then be sent to the person notifying they have been approved and providing more detailed information if needed.