Don

We had this problem, to overcome this we gave the current user account 
permissions to write into the \WINNT\SYSTEM32\CONFIG directory.

To do this, use Windows explorer and then right click the above directory.  
Select the properties option and then the security tab.  Click the permissions 
button and add the current user and give him Full Control.

This will enable you to copy back the original registry into the directory. Now 
reboot as normal.

This step *should* have been documented in the bare metal restore but hey 
that's life!

Regards

Phil