To install PKG files, you must have "Package Manager" enabled via CFW or HEN.

: Packages for playing retro systems (NES, SNES, Sega) on the PS3. Installation Methods

: Commercial games, DLC, and themes purchased from Sony.

: Contains metadata like the Content ID, which uniquely identifies the software on the PlayStation Store.

: Advanced file managers for moving, deleting, and organizing installed packages.

: Place .pkg files in the root of a FAT32-formatted USB drive and select them from the "Install Package Files" menu.

: Streams and installs PKG files from a PC to save HDD space.

: The actual game data or application files that get extracted to the internal HDD during installation.