Thread: upgrading from Original 1.5 firmware to latest custom firmware

I would be grateful if someone could help, I have an original 1.5 firmware PSP which I havent used for about 3 years, I want to put the latest custom firmware on, can someone point me in the right direction please.

OF course u dont need pandora, your goal is to update 5.50 GEN-D2 i dont think u can update from 1.5 t to 5.50 directly, , so do it in steps
1st 3.50 M33
then 4.10 m33
then 5.50 GEN-D

well i am not sure if it will work , iT SHOULD