Raing3 has updated his handy PSP Tool eboot, which can: Backup and create the battery EEPROM, Restore Idstorage of the PSP, Create different Magic Memory Sticks, format the memory stick and much much more.
PSP Tool v0.8 changes:

Added options to create DC3, DC4, DC5, DC7, DC8 or an original 1.50 Update Flasher Magic Memory Sticks (read [...]