You will need to locate the Codebreaker_v10.elf file.
Use uLaunchELF (built into FreeMcBoot) to navigate to mass:/ (your USB) and select the ELF file. codebreaker 101 elf ps2 download link
: Developers sometimes host utilities like cb2util for managing CodeBreaker files. Alternatives: Cheat Device for PS2 Codebreaker, OPL, and SMB Tutorial Using FMCB (2020) You will need to locate the Codebreaker_v10