thanks for this great tutorial..im finally on 4.01 M33-2
Keep up the good work!!
btw..for the people that get the error saying "the game cannot be started", do the following thing because I had the same thing
Access the recovery mode by following the following steps:
1. Completely shut down your PSP (Not stand-by)
2. Hold the "R" button (i.e right trigger) while starting your PSP
3. You are now on recovery mode
4. Go the "Configuration"
5. In "UMD" mode, switch it to M33 UMD diabled
6. Exit the console and start your PSP normally.
This should hopefully do the trick
enjoy!!