psp update firmware

[jj1970]

have a psp 1000 running 1.5 running custom firmware 3.40oea looking to update to latest firmware can anyone tell me if i can go straight up to the latest firmware thanks

[dell_xps]

Dont think so m8, might be wrong though look for m33 firmware, then upgrade it to Custom Firmware 5.03 GEN A and then B I think it is.

[andy6]

Click on the link below & you will find the explanation.
I used this company to upgrade my firmware, it's only ?20, but if you want to do it by yourself & save money you can read their web, it's very helpful:
PSP firmware flash, upgrade & repairs in Manchester & UK (http://playbackups.com/psp.html)

[dj flame]

try this my mate

[TUTORIAL] noob friendly way to upgrade to higher custom firmware - PSP Hacks - Forums (http://www.psp-hacks.com/forums/f133/tutorial-noob-friendly-way-to-upgrade-to-higher-t226892/)

pretty str8 forward, any trouble let me know and I'll help you with it no problem.