If "codebreaker 10.1 elf" refers to a specific puzzle or challenge within a game or a cryptographic exercise, here are a few general steps you might consider to tackle it:
Patched versions can automatically boot into a game loader like Open PS2 Loader (OPL) or HDLoader after cheats are selected. codebreaker 10.1 elf
Set the to "Codebreaker 10.1" and the Path to where you saved the ELF on your memory card or USB. How to Use Cheats with OPL (USB/HDD) If "codebreaker 10