if you have a PSP 1000/2000 ta-088 or lower mainboards u can use a pandora's battery. as long your psp mainboard is ta-088 v2 or lower. u can't use on the psp 2000 ta-088 v3 or psp 3000 otherwise your psp is bricked.
http://forums.afterdawn.com/thread_view.cfm/610313 look through that. they will show you the step to step tutorial to make your 3.93 Official Sony Firmware to any of the custom ones. but you do need a old psp battery, or the psp phat battery i mean.
ok first you take your psp apart. then you soak the buttons, and the case in ammonia and bleach for about a day or two then, you play your psp until you fall asleep in sleepyville then go to the mayors house(me) and he(I) will stab you you with a memory stick duo. and im going to use a LEXAR one!!! HAHAHAHAHAHHA
sike go to psp-hacks.com and go to downloads and then go to firmware and download 3.90 and put it on your psp and runn it and it should work, not sure though i havce custom firmware ok first you take your psp apart. then you soak the buttons, and the case in ammonia and bleach for about a day or two then, you play your psp until you fall asleep in sleepyville then go to the mayors house(me) and he(I) will stab you you with a memory stick duo. and im going to use a LEXAR one!!! HAHAHAHAHAHHA
sike go to psp-hacks.com and go to downloads and then go to firmware and download 3.90 and put it on your psp and runn it and it should work, not sure though i havce custom firmware
Requirements and Installation : - Installation requires a PSP with 3.52 M33-3 or higher [Phat PSP], or 3.60 m33 or higher [Slim PSP]. Others and Official sony firmwares shouldn't try it. - USB cable. - Battery 78% loaded, - Extract the file you have downloaded anywhere on your computer. - Connect your PSP to your computer using the USB cable. - Copy the "UPDATE" folder into /PSP/GAME - Exit USB Mode and go to your XMB - After you run the "PSP Update version 5.00", the screen will turn black. - Follow the on screen instructions, these instructions will take you to the Official Sony Update screen. press X for start..Press ">" button to continue..press "Accept" .. press ">" .. and press the "X" button Start update.. please wait..when update completed press the "X" button to restart automaticly.. done.. - Then you can erase "UPDATE" folder, they won't be any longer necessary.
you have to downgrade to psp version 1.50 then go to new version
then update it
You don't 'update the PSN', you update the PSP's firmware from the Settings menu on the XMB.
To update a chipped PSP, a person must use the system update function manually. From there, the chipped PSP must be upgraded to version 6.60.
Because it updates the PSP not the network.
to update your psp, you could just download it from the browser or use the network update on your psp. check out this fun addicting game online kddoan.mybrute.com
Sony offers three different ways to update a PSP's firmware. These three ways include updating directly via system update, update from a UMD, and update via a PC (Windows or Mac).
You can download the update and copy it to the memory card, then run the update on the PSP itself.
http://wiki.answers.com/Q/You_have_update_psp_5.00_now_you_want_update_your_psp_5.00m33"
update it
update to 3.5 on psn
The latest PSP update was 6.37
you have to update your psp until you reach 5.00