I've recently used the .bat file method on the login script to do the REGREAD

REGREAD "HKLM,SOFTWARE\Novell\Workstation Manager,Registration Agent"
IF "%99" <> "zenwsreg.dll" THEN

Its working fine on machines that do not have Zenworks install.... but what is the best method for upgrading exsisting Zenworks agents (Zenworks 6.5) that do not have Application Explorer enabled to Zenworks 7 SP1 with Application Explorer enabled? Is there a way to have it check its version and if its 6.5 to proceed with a one time silent Zenworks upgrade????

Thanks in advance