You can't do that anymore, Apple has stopped it.
Not sure. Why not downgrade?
No. You must restore to Downgrade the Firmware!
I'm sorry, but you can not downgrade it back to firmware 6.2 Any firmware after around version 5.5 cannot be downgraded i think. It also depends whether you have a psp 2000 or psp 3000 I have a psp 3000 and it was too late for me to downgrade
no
May your firmware is higher then 4.1 and so it doesn't work so downgrade your firmware
Downgrade your firmware to 3.1.2. This does not work for the 3G.
iOS Firmware 4.3.3 is the size used for iPad 2 16 GB.
No, you have to downgrade first.
You Can Do It Using Pandora Battery.
Right now there isn't. If you want to get custom firmware for psp version 6.20 you need to downgrade to custom firmware using a Pandora battery.
If you have 3.1.3 firmware then yes, you will have to downgrade to 3.1.2. This does NOT work for the 3G.
It depends which Firmware you are on.