her you go,Is there a tutorial how to generate boot ising EmmcHaccGen?
put your firmware a folder and rename it to fw, it should be in the same location at EmmcHaccGen.exe along with your keys.txt if you have prod.keys change the line in the Command to mash what you have or you can just rename it to keys.txt,
after that's done you can cd to the location where you have all the files or just type cmd in your address bar in your Windows Explorer.
EmmcHaccGen --keys keys.txt --fw fw