Software like ISOBuster is used to extract and modify the internal files of a PS2 ISO.

Because PS2 FPKGs run inside a built-in Sony emulator, standard "Action Replay" or "GameShark" discs cannot be swapped easily. Instead, you must use one of the following: Custom LUA/Configuration Patches : Most modern cheats are applied via files. These are part of the PS2 Classics configuration files

Run the builder. Ensure the "Include Cheats" flag is checked. The tool will compile the game data and the cheat engine into a .pkg file.

This is arguably the most popular feature of All-in-One cheat packs. The PS2 era was strictly 4:3 aspect ratio (the square-ish shape of old TVs). Playing a 4:3 game on a modern 16:9 widescreen TV results in ugly black bars on the side.

Grab an external HDD, load up your favorite ISOs, build those FPKGs, and enjoy playing the PS2 era the way you remember it—not the way it actually was.

: This is the primary utility for creating these packages. When building your game on ConsoleMods

Some packages include a "pre-loader" like wLaunchELF or CodeBreaker that runs before the game begins, allowing the user to select active cheats before the main ISO boots.