SonyXteaM is proud to present you their new downgrader for psp 1006 and 1007 (BETA)!!, Yeah you heared it's finally out ! it's been developped by Yoshihiro from SonyXteaM and here are the instructions !
This as been TESTED on psp-1001 and psp-1004 however we are not responsible for the eventual damage
Release notes:
We figured out that the error 80000025 is a system config error and that the system configurations are located in flash1 so we replace the original flash1 from the psp-1006 and 1007 to the ones from a psp-1001 unit.