It is all here:
http://www.rodsdot.com/development/Authentication/default.aspIncluding registration, password recovery, etc. etc.
There are some rough spots inn the last few pages of documentation, but the code is working.
Okay, the code needs to be moved to an include as well, but it is fairly robust, and has been migrated to several sites successfully.
I do need to make some major edits to the tutorial however which is on my short list of things to do.