Packages allow you to organize your files for the end-user. The Easy Install package is the given name for the package of files to be installed if the user selects to do an "Easy Install".
Other packages can be custom packages (usually a subset of the "Easy Install" package).
Custom packages appear when the user selects "Custom Install" in the popup menu on the main Installer screen.
To create a separator line within your custom packages, name a package ‘-’ (just a dash). Reposition it within the list by dragging it.