How to downgrade a PSP official firmware 3.93?

psp? how do you downgrade the psp from the original firmware to custom firmware ex: 5.00 firmware please help!!!!1

I have a psp with a 3.90 M33-3 custom firmware. Could someone please help me to downgrade my friends psp using mine cause I heard you can create a pandora's battery with a psp that has a custom firmware. Please and thank you.

I currently have 3.40 wildc*rd firmware and i want to downgrade to 1.50. The reason is that i want the official firmware now

I recently bought a psp 1001k off of Amazon.com and bought a couple games (Dissidia 012 and Final Fantasy IV The Complete Collection) while I was at it as well. However, whenever I go to play these the "Game Could Not Be Played" (or something...

i want to enable firmware 3.52 M33-4 on my psp, but it says i need to downgrade it to 1.5. if its possible, i need to know how to downgrade it, but if it's not possible, how do i enable 3.52 M33-4?

I would like to find a way to do this without a Pandora battery. If there is no way to do this directly from my current firmware, which firmware can i upgrade to and how? In the hopes of eventually downgrading all the way back to 1.5? Please don't just...

I foolishy upgraded my psp slim 4.01 to 5.5. Only now i know that there is no custom firmware for 5.5 firmware. How can i downgrade my psp and install customfirmware?>??

So I got this new PSP just like 10 hours ago, and now I want to hack it so I can download games and play then on my PSP for free. I did some research and I saw that I need to have a Custom Firmware 5.03 to make it possible. So, how do I downgrade my...

I Have a psp version 3.40 I want to downgrade it to some firmware where I could load downloaded games onto it. I tried to find how to do it by google-ing but all I find are ...show more