If you have a PS2 with Free MCBoot (FMCB) and Open PS2 Loader (OPL):
For PS2s running , you don't need the full ISO. FMCB is a softmod that installs homebrew apps directly on a memory card. You can download a patched Codebreaker.elf file, place it on a USB drive, and launch it directly from the uLaunchElf file browser on your PS2. Some pre-configured FMCB memory cards even come with Codebreaker already included. Ps2 Codebreaker V11 Iso
: Pre-loaded with codes for thousands of PS2 games. If you have a PS2 with Free MCBoot
: Place the CB_launch.elf file in your memory card's BOOT folder. place it on a USB drive
Keep in mind that: