Degradation is not so terrible as you think, let me share the operate method with you.
First
1. Into the system setting, select restore default setting to make your PSP restore the factory settings.
2. Reformatting the memory stick. after restore factory settings .
Second
Download demotion process. There will be three special place just as follows when you have uncompressed files:
1. h.bin and index.dat on the Memory Stick root directory.
2. overflow.tif placed PHOTO.
3. Create a UPDATE folder In the GAME directory, inside the EBOOT to the UPDATE.
The third step
Open the PSP, access to the desktop PHOTO option, open overflow.tif picture, click on and then your PSP screen will become black, and then appears three row number on the left screen, similar to the following figures:
009C4000
00000000
000001E0
Switch off the PSP in 30 seconds from the emergence of this three row number.[Note: push the switch up more than 10 seconds the machine will shut down, please do not let your hands go until the green power indicator light turns off] .
Step four
Wait a while and then boot after the machine shut down, this time, you must connect PSP to computer, you will find more of the following documents :
index.dat.bak
100.bin
camarche.dat
If so, which means that you can continue to operate a downgrade.
Step five
Disconnect the PSP and computer, run desktop memory stick directory vers1.5 update process in the PSP system, then enter the upgrade process, the machine on the progress of 99% it will display an error just similar to the following text:
The update failed
Contact the Sony Computer
Entertainment technical support line for assistance
(ffffffff)
The machine will shut down if these letters is that over 30 seconds, shutdown method is the same as mentioned in the third step.
Step six
Re-boot, the screen will appear a blue background, and there will be a lot of words, every word carries ○ behind the symbols, this time you press ○, and the machine will automatically reboot.
Seventh Step
Re-starting the machine automatically, please check your systme information. Congratulations! Successfully downgrade your PSP!
It’s very simple, right?