A. A. The easiest way to do this is to use the net localgroup command, however before you can use the command you have to have connected to the PDC and start the netlogon service. The following commands can be used in the unattended installation using the CMDLINES.TXT file:

net use \\<machine name of the PDC> /user:<domain name>\<username> <password>
net start netlogon
net localgroup Administrators "<domain name>\<user>" /add