[Samba] group policies, domain policies and workstation policies without Active Directory??

[Michael_Ruzek at log.at]

I have the following situation: a network with 30 Windows NT Server on
different sites, 800 clients with Windows XP; I want to migrate to Samba
instead of Windows 2003 Server, but I have the effort to manage group
policies, domain policies and workstation policies on the XP Clients;

is there a way to solve this without Active Directory e.g. Samba with
LDAP??

Michael Ruzek