Is anyone out there using the domain parameter in a client option set?

I am trying to just back up the D drive on a machine, in the option set I
have domain option value set to "-c: d:".

There is no domain option in the local options file, and the issue is that
the system objects keep getting backed up!
Given that this is a field office with a 128 K connection, this is an
issue.  I would like to use the option sets and yes I could just use the
local option file, but I would like to keep as little settings in the
local option file as possible.

Client: 5.1.5.15
Server: 5.1.6.2

Thanks for any input!

Greg Redell
Great-West Life & Annuity Insurance Co.
Phone: 314-525-5877
Email: Gredell AT GWL DOT com