Guido and I (mostly Guido!) put together the Definitive Guide to Active Directory Disaster Recovery a couple of months back. You can download it from the NetPro website at http://www.netpro.com/forum/files/Active_Directory_Disaster_Recovery-Part-I.pdf. You can get the first part just by clicking on the link. To get the second part, you have to follow the URL at the end of the Part I document and register. Gotta love those marketing people