Are you talking about psps? lol
If so the way i updated it to latest firmware was
I used that guide to upgrade to 3.80, From then on i downloaded 3.90pbp off the internet. Then i clicked "Network Update" I downloaded the installer files (But doesnt include the .pbp file)
So then i put memory card in and put the pbp in, went to PSP/GAME/CONSOLE and clicked the "M33 UPDATER" and follow on-screen instructions. And then i did the same for latest version (4.01 m33-2)
But then bricked it when my theme corrupted the vsh folder :'(
Hope this helped you..
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