The first thing to decide is how much of the local disks are you going to
backup?  What is your current procedure for handling the death of a desktop?
Do you simply replace it and it gets its personality from a server
somewhere?  If this is the case, you probably can get by with backing up
certain directories, like c:\my documents\*.  If your death of desktop
restoration plan involves replacing a dead disk and then restoring it from
someplace, then you'll want to back up the entire disk to ADSM.  This is
much harder and with 3-4000 desktops, lots of data.

You can use a client option set to control what is backed up.  Ensure that
the client option set option overrides the dsm.opt file on the individual
PCs.

You might want to use open registration to register all of these clients.
Easy for you, unless you have some standard naming scheme you want to
employ.  Be a little careful here as you can have a mess on your hands.
Open registration places all nodes registered this way in the STANDARD
policy domain.

Limit your data, maximize your control and plan, plan, plan and you should
be ok.

Kelly J. Lipp
Storage Solutions Specialists, Inc.
PO Box 51313
Colorado Springs CO 80949
719-531-5926
www.storsol.com
lipp AT storsol DOT com