The recommended implementation would be to utilize a console installation on an internet connected machine to update data files and download patch data, then move the files to the disconnected environment.
We do not currently have a script to download patch data, but we have updated the powershell script used to download the data files. The powershell script, as well as the necessary instructions, are available as follows:
The link you provided had the information I needed.
I did run into one problem. If you install the 64 bit version of 7-zip on a Windows 7 (x64) the powershell script will not pick up 7-zip as being installed. To correct this, I extraced the 32bit version of 7-zip to the folder containing the powershell script and pointed to that installation of 7-zip and all worked as expected.