I'm not sure I get what you mean with "without using the script".
To implement the hardening guide advisories you have to make some changes to the configuration of the VMs.
That can be done with commands in PowerCLI or Perl (like Willima showed).
The combined advisories and the way to do this in a automated way is implemented with the script.
The alternative would be to type the commands VM per VM at the command prompt. That is not really what you want to do I assume ?