Log onto www.playstationport.com and search for "updating my psp". You will find it. :)
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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.
You can't update a psp without a working battery. It'll state that the battery is low and you need to charge it.
you need to update it like by putting new games that have higher update versions and your psp will be updated and you will get cool stuff like the tasty treat theme.
Im not quite sure but i think you can update it through the internet. PSP's should have wi-fi on them, just turn it on and see if there is an update button in the main menu.