HELP needed psp 3.40 OE - A

[god36]

hello i am in need of help i'v got a psp off my firend and then it bricked the day after so i sent it off to undercutters to fix it, now i'v got it back and i'v got 1.5 custom firmwear, my psp in a 3.40 but i want to make it to a 1.50, i'v watched some vid's on youtube and other web sites but i cant get my head around it, so can some one please help me???? thanks perry

[TRIPLEM]

Okay first of all upgrade your 1.5 psp to 3.52 M33-4 then downgrade your 3.40 with a pandora battery to 1.5 =)