>However, within NT some files cannot be backed up while open.  Registry
>files are in this category.

A good reference for this topic is the redbook "Windows NT Backup and
Recovery with ADSM" (SG24-2231).  Topic 4.1.2.1 Registry Backup nicely
explains this area.  *SM uses an NT-provided API to access the active
registry files and copy them to an adsm.sys directory, whereas one should
exclude the system32\config Registry area per se.  *SM then backs up the
copies of the Registry files from the adsm.sys directory.  Per the
BACKUPRegistry option default, the Registry is always backed up.
   Richard Sims, not an NT expert, BU