Download PlayStation 3 Firmware v3.56 Spoofer To Prevent/Stop Automatic PS3 3.56 Firmware Update
Folks at Rebug team have released Playstation 3 v3.56 spoofer that prevents your PS3 to be automatically updated to v3.56 firmware. This is NOT intended to access PSN online nor does it allow it. In fact, it is aimed at preventing accidental updating to 3.56 firmware.