Once Codebreaker 101 is running, you can enter cheats. These are usually found online and are specific to the games you want to cheat.

Below was a 256-character hex string. A master decryption key for every pre-2006 PS2 save file, debug menu, and prototype ROM.

The original Codebreaker 101 was commercial software. The ELF file is often shared as a backup for owners of the physical disc. Downloading without owning the original is technically piracy. If you own the disc, ripping your own ELF via uLaunchELF is the cleanest method.