PSP 6.20 PRO-B4

1.  Check your PSP System Software Version by pressing Settings> System Settings> System Information> press X

The screen will display the PSP's MAC address, system software version, and nickname. The "System Software Version" is the firmware version.

REMEMBER:  Your PSP version must be 6.20

2.  You need to download  this link:  http://www.4shared.com/file/JbgcXBLZ/620PRO_B4.html

3.  Extract the downloaded archive 

4.  Copy the 620PRO_Permanent, PROUPDATE and the FastRecovery folder to PSP/GAME.

5.  Launch the Update 6.20 PRO-B4.
 

6.  Press X to install the 6.20 PRO-B4 CFW.

7.  Your PSP is rebooting...
 

8.  Launch the Update 6.20PRO Permanent..

9  .Press X (now there's a warning, ignore it, but you can backup the file if you want for safety reasons

To avoid bricks you can press X again instead of O.

The original flash0: / vsh / module / vshmain.prx was now backed up to ms0:/ or ef0: / vshorig.prx.

Keep this file for safety reasons, if you'll have a brick you can use that file to recover your psp!

Then you are in 6.20 PRO-B4 Permanent Test-Mode.

Launch the 6.20PRO-Before Permanent Installer again, press X and then O.

The patch was now completely installed and the flash0: / vsh / module / vshorig.prx was renamed to vshmain.prx!

10.  Congratulations, now you are on 6.20 PRO-B4 Permanent, enjoy it .

TESTED ON PSP 3000 03g and PSP 2000 hackable