Hi their my PS3 right now i running Firmware version 3.72 and i want to jailbreak by the safety way like not gonna brink my console . Does some one know how to jailbreak or downgrade if yes please show me how to do it or do i need buy some usb dongle ?? If i jailbreak my ps3 can i play back my bluray disc ? Because sometimes the Blueray ( BD ) onsale and i will buy it . Please answer me this question and thanks !