INSTRUCTIONS:
Format your memorystick before and after each upgrade or downgrade !!!!! upgrade 2.81 to 3.03:
PSP users running firmware from 2.81 to 3.02 !! you must upgrade to the official sony 3.03 firmware !! Download the easy update installer:
Download: http://www.psp-hacks.com/file/1041
this will install all files for you after the install follow the instructions
of the read me file...
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Downgrade 3.03 to 1.50
PSP users running 3.03 firmware download the 3.03 easy downgrader at:
Download: http://www.psp-hacks.com/file/1042
this will install all files for you after the install follow the instructions
of the read me file...
NOTE: Downgrading from 3.03 will require a copy of Grand Theft Auto: Liberty City Stories that comes with a 2.00 firmware update on the disk.
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Upgrade 1.50 to 3.03OE-C
if you have 1.50 and want to upgrade the custom firmware 3.03OE_C of dark_Alex , use this easy installer.
Download: http://www.psp-hacks.com/file/1043