fail/brick

Greetings. I tryed to switch from 6.20 TN to 6.20 B5. I started by putting all the necessary folders (excuding sdk) in PSP>GAME. I tryed running the installer from TN, but it said I needed to be on a version of PRO. I searched, but couldn't find a version of PRO for 6.20 previous to B5 before I...