[Samba] Migrating a Samba PDC

[shacky]

Hi.
I have to migrate a Samba PDC frome one server to another new server.
The two servers have the same distribution (Debian stable) and the
same Samba version (3.0.24).
I wish to make the migration completely transparent for the client,
mantaining all the users, all the groups, all the Windows/Linux groups
mapping and all other things.
What I have to do other than copying the /etc/samba and /var/lib/samba
directories?

Thank you very much for your help!
Bye.