How to downgrade PSP Slim?

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...

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 got the magic memory stick and I know how to create the Pandora Battery with PSP Slim Battery.Now, what should I do to downgrade PSP Slim (3.90 OFW) with these two things?

i got new slim psp 3.60!!! can i downgrade it by pandora my pandora have update 3.71 M33-2 . Can i use it to downgrade it to 3.71 M33-2

i wanted to put psptube on my slim but it says it was for 3.71M33-3 and i need to downgrade my slim psp 3.90M33 back to 3.71M33-3

i want to downgrade my psp slim cus i want to download games online. i curentrly have 3.73. is there a way i can do it by the internet without having to do anything manually just by ...show more

My PSP Version was 4.01 and i upgraded to 6.00V how can i downgrade it nw please ASAP Reply

i have a psp slim 2002 with 4.05 official firmware i wan to get custom firmware on it (any). i already have a Pandora battery but i need the right files for the magic memory stick can any one help?

I got all the files for the the Pandora installer and when i start the installer on my psp slim it says: "The Game could not be started" What can i do other than hard ...show more