There have been various exploits over the years (like the ones in 2011) that allow for the installation of homebrew and PKG files. These are highly specific to firmware versions and require precise steps.
A second USB drive or external HDD formatted as NTFS for large PKG files (over 4GB) – since FAT32 cannot hold files larger than 4GB. how to install pkg games on ps3 verified
Exit Irisman. The PKG will now appear in the on the XMB for you to install. Using Network Install (WebMAN MOD) There have been various exploits over the years
Wait for the progress bar to reach 100%. Large games can take a significant amount of time to unpack and install. Step 4: Activating the Game License (RAP File) Exit Irisman
If your PS3 is running the official, unmodified firmware from Sony and connected to the internet, the process for installing digital content is the safest and most direct.
Here's a step-by-step guide to install PKG games on your PS3:
Installing PKG files on a PlayStation 3 is the standard way to add digital content to your console. For a standard, unmodified PS3 on Official Firmware (OFW), a PKG file is the official installer format for games, DLC, and updates downloaded directly from the PlayStation Store.