I would recommend that you search the board for topics relating to ADSI. Review this topics so that you become familiar with some of the usage. Then go to the MSDN site and become a little familiar with ADSI and the object model.
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/adsi/adsi/adsi_objects_of_ldap.asp
The KiXtart script you write will most likely use ADSI to access Active Directory.
