I have a slim black 2001 model psp. it has OFM ver 4.05 firmware, and know the only way to downgrade it is with pandoras battery. i dont have a psp with CFM though, so i remembered hearing that a Datel tool battery was like a "premade Pandora" the one i want to buy is a PSP MAX power tool, from code junkies. its a little orange battery that says TOOL on the front. will this let me downgrade?