Hello : I have tow pix,one is pix-515,the other is pix-515E,first bios is 4.2 and 515E is 4.3,I find 515 booting is showed "CISCO SYSTEMS PIX FIREWALLEmbedded BIOS Version 4.2" ,and 515E booting is showed"CISCO SYSTEMS PIX FIREWALLEmbedded BIOS Vers...