I found a utility that is very similar to AutoPatcher and you can install Windows updates without an internet connection. It is called c’t Offline Update but some people call it DIY Service Pack.
What c’t Offline Update can do is lets you download Service Pack and all Hotfixes for Office 2000, Office XP, Office 2003, Office 2007, Windows 2000, Windows XP and Windows Server 2003 in 18 languages.
Once you’ve finished downloading the updates, you can burn the contents in “client” folder to a CD or DVD. Inserting the CD/DVD to a computer will automatically prompt you to install the updates.
Most updates can be downloaded as a standalone installer and burned to CD or DVD so that it could then be installed on the machine which doesn’t have Internet access.
If you have a WSUS server setup you can use this MSKB article to download all the available patches into the WSUS server so that they can be deployed to all the machines on the disconnected network.