Always keep a backup of your original CODEBREAKER.ELF (vanilla) and your unpatched cheat database. The patched version is a tool, but understanding how it differs from the original will save you hours of troubleshooting.
: Instead of looking for a physical disc, the patched version is configured to launch another ELF file—typically OPL —after cheats are selected. Codebreaker V10 Ps2 Elf Patched