Hi there, yes it’s possible to transfer the roles, but there will be some reconfiguration required. For the file server you can use a tool such as robocopy to mirror the files to the new server. It will even copy NTFS permissions over. You can also use the <a href=”http://www.microsoft.com/windowsserver2003/upgrading/nt4/tooldocs/msfsc.mspx”>Microsoft File Migration Tool Kit</a>.
To transfer the domain controller role to a new server you will need to promote another server to a domain controller and then transfer the FSMO roles from your old domain controller to your new domain controller using the NTDSUTIL tool. You can use the intructions here at <a href=”http://www.petri.co.il/transferring_fsmo_roles.htm”>http://www.petri.co.il/transferring_fsmo_roles.htm</a>. Also make the new domain controller a global catalog server. Then wait for replication to complete between the domain controllers and then you can finally demote the old domain controller with dcpromo.