You've already done it. That "hide email address from the public" checkbox is a bit misleading, but that does in fact hide it from everyone but the admins and yourself.
Also, I have it set to hide everyone's address to people not logged in to minimize spambot harvesting of addresses. Hopefully the next version of this forum software will support permissions by post count, as I can then block those 0 post spambots from seeing any profile info at all.
