I have read your post. We are really sorry to say that there is no way to control the install via the Vssetup.exe.
Once the setup is done, it will ask for a restart and then it will try to update the McAfee software to the current DAT date. You will not be able to stage the installs as it is a one shot install method.
Staging the installs/controlling the updates could be done of Virus Scan Enterprise software, but this is Small and Medium business software which does not have such advanced installation features.