Upgrading from CF 3.52

[mattress]

Hi all,

Sorry if this has been covered 100 times already but I have hunted for info and I am still clueless!.

Anyway, I have a PSP with custom firmware M33 3.52 but I am unable to play most of the latest ISOs. I presume it's because I need to update the current FW? I have downloaded a few FWs that are newer (3.71, 3.93) but I am unable to upgrade. After messing around with it for the past hour, I realise that I cannot jump straight from 3.52 to 3.93. What is the best method to get the latest firmware?

Many thanks

[XBOX4LIFE]

Hi mate
This should help (post 15ish)
Once you get to 3.80 m33-5 you can use the psp update to get to later custom fw

[mattress]

worked a treat. thanks mate.