Extension Manager 4.0 and Packages: How They Work

I'm curious about the packages in the Extension Manager v4.0 which is part of Mac OS 7.6. I notice several items that look like they should be in packages such as communication tools, several componets of a third party utility like Norton or Now, and even some older apple extensions. Why aren't these extensions grouped into the appropriate packages?
The Extensions Manager v4.0 creates packages or groups of similar extensions by scanning all the items in the System folder and then looks at each file's VERS 2 resource. Items with identical long version string fields in the VERS 2 resources are grouped into similar areas called packages.

If the ong version string fields in the VERS 2 resources are even slightly different, a seperate package will be created. There are no packages with only 1 item in them, an example of this with an additional System Sofware package in non-PCI Power Macintosh computers that contains only 2 Ethernet extensions. This is because of a typographical error in the resource.
Published Date: Feb 18, 2012