اون خیلی طولانی بود با این روش تو 3 دقیق دانگریدش کردم :
Just download Hellcat's Recovery Flasher if you don't already have it and copy the RECOVERY folder into your X:/PSP/GAME folder. You'll need the OFW update pbp of whichever version of M33 you wanted to downgrade to, in this case 5.00...