[Jachra]

Сообщение от andrewnick hello!I have just bought a psp and i would like you to help me.I have the official sony 3.51 firmware.Can i install the 3.52 M33 Firmware directly?What should i do?

No, that firmware must be installed from Sony firmware 1.50 or any other custom firmware. You must downgrade your PSP with the Pandora battery. You can not make one, because that requires a PSP with Sony firmware 1.50 or a custum firmware.

You need to find someone who has an older firmware 3.50 (or lower) or a custom firmware installed. The other one with a Sony firmware 3.50 (or lower) can be downgrade to Sony firmware 1.50. If the other one has an custom firmware the you can directly create a Pandora battery. You can use this guide to create an Pandora battery. The guide is made by FreePlay.

Maybe you can find someone who already has an Pandora battery. This link might help.
Good luck.