I have a BIOS HP dv1580se. I modify this BIOS http://h10025.www1.hp.com/ewfrf/wc/...n&dlc=en&cc=us&lang=en&os=228&product=1815886 There is 2 file WPH. I mod all those 2 files. How can I flash them using Winphlash? Do I update all 2 files or just 1 file, if I only need to update 1 file, which file should I update?