i have a ps3 that is a running 4.82 firmware. its downgradeable to 1.90. its a chechG01 PS3fat model which would be a nand i go here http://**ps3xploit.com >Domain no Longer owned by team** (ps3xploit.me =new)/dumper/index_nand.html and initialization fails every time. i have the usb in the right usb port which should be this /dev_usb000/dump.hex option.
md5sum of PS3UPDAT.PUP file: 152d950c365ede4130c53ceb18dcd43b
md5sum of PS3UPDAT.PUP file: 152d950c365ede4130c53ceb18dcd43b