PSP 5.51 HACKABLE! this instructional video will show you how to install custom firmware on a psp 5.51 so it becomes 5.00m33 - 6. PANDORA BATTERY REQUIRED! UK SITE - pandora-battery-shop.co.uk USA SITE - pandorasales ?gclid=CK-2-5ut05sCFUQA4wod2hfUJA (Havent tested the usa site so...