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.
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