This OPSI SERVER Command line Tool (Opsi Updater) will check for available OPSI Product Updates on official Servers (example Mozilla) and will allow to Download and Update older Product Versions on OPSI Repository and distribute them on clients having older versions.
readme:
http://svn.code.sourceforge.net/p/opsiupdater/code-0/trunk/readme.txt
open source client management system, software deployment
opsi is a Client Management System for Windows and Linux clients based on Linux servers.
opsi is used for automatic OS installation, software depolyment, hard- and software inventory, distributed software depots.