How can I flash HP Laptop?

[Dalrae]

Hello, I made a mod for my HP laptop, but there is a file with the extension .sig. When I used AMIBCP64, it didn't recreate this file, and when I try to use HP's built in flasher, it says it can't find the sig file. I tried to put the old sig file in there, and that didn't work. Does anyone know how to recreate a sig file, or bypass this protection? Thanks! Here is my "modded" bios that I changed the video memory size: http://www.filedropper.com/08355mod