Here is a little background: many years ago i bought a PSP1001 new in box. I gave it to a much more tech-savvy friend who installed custom firmware for me. I never really used it much but now I want to get some use out of it. I tried getting some backups for some psp games and noticed that the newer games were not working and I ASSUME it is because the firmware is out of date.

What I can tell you is that the system info says I am running 5.00 M33

1. What firmware should I update to?

2. What is the best method/where can I find instruction?

Any help is appreciated, thanks in advance.