samba - Feb 2013 - Complete migration Windows 2008 R2 PDC to samba4

Hi everbody,

i Am trying to perform a full migration from windows 2008 R2 x64 primary
domain controler (forest and domain at 2003 level) with DNS
AD integrated zone to samba4.

I have created a test environment to perform this task but i am unable to
execute a full migration to samba4.

I have tried to use DNS internal and Bind9 but in both case i get always
problems replicating two zones:

DomainDnsZone and ForestDomainZone.

How can i migrate to samba4 and fully demote windows PDC without recreate
AD?

Thank you in advanced

-- 
Cumprimentos,
    S?rgio Machado