How do I downgrade my PSP from 5.50?

I have a white vader 2000 and went from m33 to 5.50 Gen D3 with no problem but I cannot see any ISO games when put into game folder. I want to go back to m33 and not sure how to ...show more

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...

I have Firm Ware 6.20 on my PSP and wanted to get CFW 5.00.but I dont have the money for a pandora battery and i already formatted my PSP. is there a way to downgrade my PSP without pandora's battery? I have PSP 2000(PSP slim) Im not sure what motherboard...

Ok I have OFW psp version 4.05 and want to downgrade I have the pandora battery I took it apart and did what was required and now all I need is the files first is it possible to downgrade my version of Firmware and second do you need a homebrew psp....