Homebrew Release: Introducing Patch Installer, a homebrew created with the purpose of giving you the ability to update or downgrade any retail game you own right from your PS4! : r/ps4homebrew
Updating a Fake Pkg Game with a Mismatched Title ID/Region Patch - YouTube
Dumping and repackaging your games PS4
PS4 PKG Repackager to Repackage Fake Updates by Duxa (Chrushev) | Page 8 | PSXHAX - PSXHACKS