Downgrade PSP 6.35,6.38,6.39 and install CFW

Hello All! This is my guide on how to downgrade to 6.20 and install cfw (Custom Firmware) on your PSP 1000,2000,3000 or go. This works on
6.35,6.38,6.39 BUT NOT 6.37!
You will need:
6.20 update http://dl.qj.net/psp/firmwares/psp-firmware-620-update.html
PSP downgrader http://dl.qj.net/psp/homebrew-applications/639-downgrader-v31.html
6.20 CFW http://dl.qj.net/psp/homebrew-applications/cfw-620-pro-b8.html

Step 1: First things first

Unzip to desktop. Now take the 6.39  Downgrader and put it into PSP/GAME and Put the 6.20 update EBOOT  into PSP/GAME/UPDATE.
Also it says 6.39 but it still works on the others. Now place the PRO UPDATE (CFW) into PSP/GAME also. But if you want permanent psp cfw then put the permanent one into PSP/Game too.

Comments

[insidiousbag]

A very useful instructable for those which have had trouble downgrading in the past. Though the links do need revising for the Official Firmware (OFW). Also there is a more comprehensive guide here http://gbatemp.net/topic/291169-hack-every-psp-up-to-firmware-660/ But all in all, well done.