I have the same problem; My PS3 flashes for hours and I dont know what to do. It is CECH-2004b 250GB slim 3.55 and Jailbreak; Amazebreak 3.0. I followed the instruction, just like Mimmo258. I tried to use many pendrives (FAT32) and lots of 'Lv2diag.self' versions. Have you guys solved that problem? Please help!