The details and a download are on my site. This is my first MOD.
Just to recap:
In a Nutshell:
Allows the administrator to choose an additional option for user activation. Dual activation requires both the user and the administrator to approve new users.
Please tell me of any errors you have as I know there are many. If you have ideas for its expansion, let me know too, please. It is made only for 2.0.4, but if it works on other versions, great.
Update 6/23/03: I have officially discontinued development on this MOD. If you want to continue development, feel free to do so.