additional...
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