How to Your Custom Firmware MOD Your PSP : 12 Steps - Instructables
Finished my latest mod. Full shell and power jack replacement, with IPS screen mod. They're on Ali Express for £25 all in & Macho Nacho Productions is your man for the IPS
Ultimate Sony PSP Mods and Designs Collection
How-To: Analog control stick for your Sony PSP | Engadget
Release: Infinity 2.0 – Enables Permanent 6.6x Custom Firmware for all PSPs! - Wololo.net
PSP Mail-In Custom Firmware Mod Service (All Models) – MPB Electronics