I think you overlooked Dan's advice?
DNS/BIND is one of the most exploitable security issues on the web, perhaps only IIS is worse, but I digress. In addition, the sporadic hammering your server will receive from global DNS peers is not trivial, depending upon your bandwidth.
I would /strongly/ reconsider the urge to host your own global DNS and use your ISP or one of the free services.
In addition, if you are unfamiliar with the very cryptic rules associated with establishing a true DNS server you are kidding yourself that anyone on the Forum can post simple instructions.
I suggest getting the O'Reilly DNS/BIND book as a starting point so you can maintain this beast if you persist.Read up, then ask questions. You'll get more responses!
regards,
patrick