Symantec Packager came with version 8 of the product. From version 9, the product was again shipped with .msi package for the client. There are multiple ways of installing the client with the .msi package, for example with a software distribution tool, like SMS or Altiris. Using active directory to install the client at computer startup with a script is maybe the best solution.
Other than that, you should upgrade to the latest version, 10.1.7, to start stopping Spyware in realtime scanning, as version 9 only scans for spyware in scheduled or manual scans. You can have a mixed environment with 9 and 10 clients, as long as the antivirus server is upgraded.
I am not sure if Symantec Packager is supported anymore.