Concepts,Best Practices,Step-by-step guides,Troubleshooting Technologies – Microsoft Technet
Technologies for Windows 2000 server
http://technet.microsoft.com/en-us/library/bb727169.aspx
Overview of AD troubleshooting
http://technet.microsoft.com/en-us/library/bb727052.aspx
Troubleshooting Active Directory—Related DNS Problems
AD Backup and Restore
http://technet.microsoft.com/en-us/library/bb727048.aspx
Troubleshooting AD Installation Wizard problems
http://technet.microsoft.com/en-us/library/bb727058.aspx
etc.. etc.. many more..