There is nothing Debian specific in that article, and every one of those packages comes as a tarball, which can be installed on any system, not just Debian. They will work on Centos just as easily.
Also, this particular program has rpm's for FC3 and FC5. I don't think that works for Centos, but maybe it does?
The setup of a named.conf file is fairly easy, and anyone that can read will see the pattern easily enough - name the zone, name the file, list where it should be, game over. You could (for security sake) put up directions on how to add a zone, or if you can keep the web/DNS function on a private address, so it cannot be reached from outside your office/VPN, then maybe use a web interface. The security of a web interface is what scares me. I wouldn't allow something so common to have such power, but that is my personal take on things. I'm sure many people do successfully allow web management of their DNS.