Main entry point: http://technet.microsoft.com/en-us/library/cc731868(v=ws.10).aspx

step1 – backup AD LDS: http://technet.microsoft.com/en-us/library/cc730941(WS.10).aspx

step2 – restore AD LDS: http://technet.microsoft.com/en-us/library/cc725903(WS.10).aspx

On MS Technet:

Operations

 Active Directory Lightweight Directory Services Operations Guide