VERY EASY) Install Custom Firmware 6.60 PRO B10 PSP 1000, 2000, 3000 + DL - YouTube
How to Hack a PlayStation Portable
4 Ways to Upgrade Your PSP Firmware - wikiHow
4 Ways to Upgrade Your PSP Firmware - wikiHow
System Update
PSP FAQ - How Do I Update My PSP Firmware?
Firmware 3.52 now available on Network Update | Engadget
Ultimate PSP mod! AcidMods forum user JoblessPunk modifies the PSP-2000 to include a second analog nub, internal 32GB flash memory, i… | Psp, Firmware, Flash memory
PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Digiex