I'll be trying these tools out. Maybe you should too.
The DVD Generator Build and deploy an up-to-date, customized, unattended and complete Windows XP. All in one DVD. Linux-based.
The Updater Deploy on all your workstations latest software. Always have it upgraded.
The WINNER Project WINNER (Windows Is Not Necessary for Everyone's RIS) is a different way to set up a RIS Server, with impressive specificities. Linux-based.
SysAngel Software Updater