Dual Public DNS HOWTO not working

hi,
im just wondering if anyone of you guys have successfully used the Dual Public DNS HOWTO for Mitel Networks SME Server 5.6 for in the contributed howtos ?
(http://www.e-smith.org/docs/howto/contrib/dual_dns.html)

because ive already tried it 3 or more times but all failed. i dont know why but i followed EXACTLY how it is being done in the howto. is there a correction for that of some sort? coz it really isnt working when i applied it. i always end up reinstalling everything.

i also tried emailing Allen (admin@allenscomputing.com) the author of the contributed howto but he havent answered me up to now.

and i also tried using the Public DNS Server for SME 5.5 and 5.6
(http://wiki.contribs.org/weblinks/redirect.php?id=290) by Jason Benedict Low found in contribs.org but still it didnt worked out right. it even caused me more headaches to me than the Dual Public DNS HOWTO by Allen.

i read from the thread in general discussion that the howto of Jason Benedict Low has been revised by another person but his explainations are not in step-by-step so im affraid ill mess up my server again so i didnt applied it.

any help/advices that will help make this work is greatly appreciated.

Arjay

PS: im sorry to repost it here but i really didnt had any answers from my original post in the experienced users. i really need a help on this