How to understand why MailStream Plus 8.3.3 on IBMi now only has one installation savf (savefile)

MailStream Plus 8.3.3 and later 

Operating System:  IBMi (AS400 iSeries)
The last page of the Release Notes mentions new simpler install with the single G1SVINSTL-

Simplified software installation for IBM® i
As of Release 8.3.3, you download one file, G1SVINSTL, instead of 5 or more files. The SAVE files are now stored
within G1SVINSTL, and all relevant code will be restored to QTEMP. This streamlines the download and installation,
and reduces the likelihood of errors during the installation process.
UPDATED:  August 14, 2017