I have updated the Approve Membership Lite hack for use with the latest release of RavenNuke(tm) 2.2.0 (aka: 2.20.00). Do remember that this version is ONLY for the 2.2.0 release of RavenNuke(tm) and is NOT interchangeable with other nuke versions/forks.
This hack provides a way to force approval of new user registrations (as well as can even auto-approve). It takes the latest RavenNuke(tm) 2.2.0 Your Account module and the Approve Membership Module version 6.1.6 from Ulsoft and provides a simplified "Lite" version that only has the user approval piece (i.e., no "Custom Fields").
Download it now or just check out the detailed features list and change log.