http://www.icyphoenix.com/viewtopic.php?f=35&t=4903&p=33174#p33174
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Chaotic
Wed 15 Oct, 2008 22:05

Re: Admin Approval To Access Site
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You are looking for a mod that will not show any of the site to visitors without approval from the administrator?  I don't believe I have seen anything like that before.

You could set all your menu links, blocks, and forums to private until someone registers a user account at your site.  You can also allow users to register their new account, but require administrator approval by: ACP -> Configuration -> Server: Enable account activation: Admin.

Just an alternative!  Perhaps someone else will know where to find such a modification.