hi guys . anyone remember me ? really out of this psp scene .
anyway do guide me step by step as I intending to help my friend upgrade his psp.
his psp version is 3.40 oe a now and i know it is currently way to outdate already .
so to upgrade to a newer version what thing must i do first ?

is it 3.40 oe a > 3.71 m33 > 5.00m33 ?

don't mind providing me some download links too