I've been using DNS2GO for a month now on my e-smith server.... works like a charm! To install, just download the .rpm file from their website, install it on your server by logging in as root and running dns2go. Do a man on dns2go for more details..... also, add a line to your rc.local to start dns2go automatically on subsequent boots.
Let me know if you need more help.... I might be able to do a HOWTO on it.
Good luck.
Salim.
PS: if you try it, let me know how it works out for you.