Restore master db

Ehm, Bill, It's the master database :-)
That is a nifty thing to do, but well documented by MS:

In general for system databases:
http://msdn2.microsoft.com/en-us/library/ms190190.aspx
more precisely for the master:
http://msdn2.microsoft.com/en-us/library/ms175535.aspx

Hope this helps ...

... make sure everything is exactly the same as on the old server, otherwise you will have some challenge !
Thinking of file locations, hardware, machine name ... just to mention a few.

Hope this helps ...

I guess my question , more specifically is the following;
I have full backups of Server A (all sys DBs and user db)  If Server A were to take a dirt nap and I needed to restore these backups to Server B, how do I get around the issue with the login accounts being restored?  I can restore all DB's except for the master , which contains the login info.  I have yet to find a solution that explains how to do this especially if the file structures  are different on the 2 servers.
I see you point out these issues in your 2nd response as challenges.  So what is best practice for a recovery scenario when you need to restore a DB to a different server?

thanks,
Bill

Glad I could be of any help.