[Samba] Samba As BDC

[Irving Carrion]

I'm trying to replace an existing NT4.0 domain controller with the latest
version of samba.  My concern is that I would have to re-create all the
users on the samba machine, change the domain name (From NT-Domain to
SAMBA-Domain) on each Windows 2000 workstation, and re-configure every users
email, settings etc....(We have about 500 users with only 2 Admins.)

Is there a way to add a SAMBA BDC to an existing NT Domain, have all user
names / passwords transferred to the SAMBA BDC, and then promote the Samba
BDC to a PDC, throw away the NT PDC, and standardize on SAMBA Domain
Controllers?