wow 3.52 dam that back there.... the flasher you seem to be using is only compatible is for 2.71... like if some one with a psp fw 6.60 tried to run a 6.35 Pro update it won't run because it was only intended for psp firmware 6.35 Only not below that firmware or over it. Understand? so try to find one for your firmware or just update it to 6.60 and install 6.60 Pro update and then run the CIPL Flasher and you'll have yourself a the very latest hacked psp.. just saying
btw if all fails Do the sure way with a Pandora Battery and magic memory stick