If you are trying to get this running yourself, here is the typical workflow for that setup:
CodeBreaker v10 is widely considered one of the most compatible versions for different PS2 models (fat and slim). It is generally more stable than Action Replay Max on newer hardware. opl v093 ulaunch codebreaker v10 link
This was a popular "back in the day" method to apply cheat codes without needing a physical disc. Since you mentioned it as a "good post," here is a breakdown of why that specific setup works well and what makes it reliable for users looking to replicate it. If you are trying to get this running
Place cb_launch.elf and your Codebreaker v10.elf onto a USB drive. opl v093 ulaunch codebreaker v10 link