How can I downgrade my Psp FW from 3.90 to 1.50?

Downgrade PSP-3003 to FW 5.03 From 5.50? Is it possible to downgrade a PSP-3003 from FW 5.50 to 5.03 to use the Chickhen homebrew enabler? If not does anyone know if there will be ...show more

as you might have guessed i did something terrible to my psp... i went to network and updated the FW (firmware) to 3.73 and now i cant run anything (except normal stuff) and i have no ...show more

I downgraded my psp 3.5 firmware to 1.5 fw and was wondering if i could get it back to the 3.5 firmware. When it was at 1.5 fw i upgraded it to the official 2.8 fw and then to the official 3.00 firmware? What firmware should i upgrade it to to get it...

I have watched numerious videos on how to downgrade my PSP slim, but they require and old PSP battery and sometimes they want me to take apart the original PSP slim battery apart. I tried to get youtube videos on my PSP and YES I CONVERTED THE VIDEOS...

question 1: ok here is the thing. i have a psp running on firmware 5.00m33-6. can anyone tell me how to downgrade my psp to firmware 1.50 without a pandora battery? i also have a psp running on firmware 5.00m33-4 and i want to downgrade it to 1.50 too...

Hi there i have got a crw psp which is 5.00 m33-3 and i want to downgrade my mates psp which is 4.01 ofw. Can someone tell me the easiest way to do it. i have got a pandora battery but no magic memory stick. . Thanks

i have a psp with 3.71 firmware on it ( i bought it from a buddy that way) and i want to downgrade it to firmware 1.50. i googled this and found out about the whole pandora thing but the problem is that i dont have access to another psp...... i have...

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 need to know how to downgrade my psp slim version 4.01 to 3.71...... the reason is because my psp is hacked, and i used to be able to play the games that i downloaded in to my memory stick, my psp slim used to be a version 3.71 until i got skype and...