This is not a Cisco question (since the cisco software
can't help).
Look in some of the microsoft.public newsgroups.
Maybe search Google Groups for
[microsoft.public unattended software install]
["microsoft.public" unattended software install]
without the brackets
Look at login scripts (if you actually do a network login).
I suspect but do not know for sure that
our VPN users log in locally to the PC and
then just mount drives. I do not believe that
this invokes the network login script.
Also:-
Microsoft Remote Installation Services (RIS) ships as part of Windows
2000 Server.
Microsoft SUS Microsoft Software Update Services
There is also microsoft SMS, I think that it is big bucks
and may be obsolete anyway.