Ok, so if you go through this, but you only want the required profile fields to be visible on the registration form how do you do that? IE: I only want to add one field (profession) to the registration form, but using the steps above it adds all of the fields (though only makes profession required). I don't want the other fields on the registration page.

I think if you are logged in as an admin (or host) and navigate to the page to manage your profile, there will be radio buttons to the right of each field to determine whether they're visible to public, members, or admin only. Not sure if I'm answering the question that was asked...