i'm wanting to downgrade my psp 1000 to 6.20 from 6.60 in order to install permanent custom firmware. wololo has a link to do it. i'd paste the instrucitons but i don't think gbatemp allows other forum links. i just want to know if this is safe? my psp is fat v3.0, bat eeprom access read and write possible cfw. yes w custom IPL (from pspident 0.75). Also is it best for me to delete 6.20 pro c temporary first before downgrading?