Upgrading a really old PSP

[-=me=-]

Hey guys, I just rediscovered my old PSP that has not been used in about 2 years. I want to upgrade it to the newest custom firmware, whatever it is, without bricking it. I think my PSP is somewhere around 3.03m33 or something similar

So whats the newest c.firmware, is there a certain path i need to go about upgrading this thing, and what exactly is the process?


I cant believe i remembered my username lol

Update: Its a PSP 1000