downgrade any psp's (2000 & 1000) this video
for more information go to - http://www.customizedpsp.com/
LINKS - http://www.customizedpsp.com/?page_id=60
THIS DOESNT WORK FOR PSP 3000
learn how to install psp 3000 from -
http://www.customizedpsp.com/?page_id=71
