Help uninstallin cfw 4.01 m-33 2

[rugaric16]

just got a psp slim and im selling my old psp phat and need help uninstalling the custom firmware and reverting my memory stick back to normal, i tried the recveory menu e boot but it says, game cannot be started even when i have it on m33 drvier or sony NP9660... any help??

[DarkFoxSniper]

Just put a Sony Update(Greater then your current CFW) on the MS and run it..

[rugaric16]

Just put a Sony Update(Greater then your current CFW) on the MS and run it..

it just comes up as corrupt data

[Geek]

put it in the game folder in a folder labeled UPDATE name the PBP, UPDATE