ArtemisNZ

I am trying to update VectorWorks 2009 with the SP1 update. When I run the downloaded update it gets to "Starting Installation..." and is unable to get through our firewall. Why does the downloaded update need to go out on the internet? Is there more to the update than what is downloaded? and is there a way to bypass the internet check or do I have to open ports etc on our LAN everytime this thing gets patched? I would also prefer not to run the Help > Check for updates option. Cheers