To transfer domain controller one system to another frist of all we need to take backup of current windows server by performing these steps-: start-programe-Accessories-System tool-backup. After selecting the beckup option you have to chosse the frist option from the backup wizard ""backupfile and setting" then press next and then chosse second option " Let me choose what to back up" then press next and then "click on my computer option" when this option will clicked the lisk of options will be display at the right side part of the wizard from there you have to chose the "system state option" then press next button and specify the path where you want to store the back of server after that press next button the system will start to take backup after the sevral minuts the back will be ready. after that take that backup in some pen drive or cd. after performing this procedure instal the windows server 2003 in new pc and give similar name etc to the server and while installing active directory to that system choose the backup option and give the path of pendrive or cd where you store the backup of previous server.