Try this same thing, maybe it will work for Personal Firewall Plus as well? Run setup.exe and when the EULA appears, go to regedit and look for something like "HKLM\SOFTWARE\McAfee.com\Virusscan Online\Installer\VSODownloadPath" (only it will be under "Personal Firewall Plus" instead). After you find the registry entry and save it to a .reg file, you can import it on your unattended CD by using a batch file. Then to install the firewall, you would do something like "McAppIns.exe /v=3 /start=vsoins.ui::default.htm /hide=1". Of course, you need to find "pfpins.ui" or whatever the equivilant is for Personal Firewall Plus instead of "vsoins.ui".