Downgrading a Slim?

[LeGaCy]

Anyone know if yu can downgrade a 3.90 official to 3.72 M33 or watever via a Pandoras Battery? Im not really sure//cuz my frend wants me to downgrade his Slim and idk if i can do it via a fat psp pandora battery

[Scruffy120]

yep, sony hasnt blocked it out yet ;) the only thing they blocked out was MAKING the battery on newer ones, and its not 3.72m33 lol but close enought 3.71m33

[LeGaCy]

But can i downgrade it even if its on 3.90 official?

[DRAGONXIII]

Yes you can i have one! but i can remeber what program i used to get the magic memory stuff on it to mod it!