Brewology

can someone please help me . i Had firmware 4.01 M33-4 then i accidently updated my psp to official firmware version 4.05. now it seems like my psp is now un-hacked and doesnt have a custom firmware anymore. Is there anyway i can return it back to cfw 4.01 M33-4 ? i really need help plz

Do you still have the Pandora's battery?
If you do, then you can.

Yeah, like crait said just go ahead and use your pandora battery... If you have one or make a new one then go back down to 1.5 then upgrade back to a CFW. And all your stuff should be there unless you already cleared your memory stick.

You don't need to go down to 1.5... the pandora method does a straight overwrite of your PSP's firmware... that's why you can use it to recover from bricks. You could potentially install any firmware you wanted using pandora, providing its compatible with the hardware (i.e. the new slims not going under 4.0). Get a pandora battery and make a magic memory stick to keep on hand in case you mess things up.

Also, please read through the rules. You are not supposed to be posting in all caps, and that includes thread titles. Thanks.