I’m writing in english to let people understand this all over the world. I have reasently read a lot of articles on how to play your backup iso and cso games on your sony psp and it really looks like it works great!!! so i downgraded my psp to firmware 1.5 which let me play all my backed up games… it’s not always you have room for all your UMD discs in your pocket when you are on the go…

so if you have already downgraded your psp to 1.5 you should download this file and install it on your memorystick/psp:

FULL DevHook 0.52.0100 with guide by doc_dread.rar

thanks to doc_dread !!