No sorry you can on downgrade with a hardeare flasher, which would be different depending on the model PS3 you have, if it's a NOR FLASH PS3 then you would use the E3 Flasher and if it's a NAND PS3 then you would use the progskeet, you can check what model you have and if you can even downgrade to 3.55; You must login or register to view this content. , also you WILL HAVE TO DISASSEMBLE YOUR PS3 TO DOWNGRADE! Post back and I'll will help you out more or answer anymore question's you have! If you don't want to buy a flasher or don't feel comfortable doing it yourself I have a downgrade service if you would like to take a look; You must login or register to view this content.