Thanks for the suggestion, I will prepare a new tutorial using Grintmint with +code after in their email.
Please use % under Linux system and use %% under windows system in the bat file (sh file under Linux system) since those characters will be escaped twice under windows system so you need to double %.
for the mine-grin.bat file, It will be simpler if to follow the guide other than set each parameter in the bat file.
if you are on f2pool, you need to register on the pool first and you need to SET USERNAME in the bat file and email is not required.
but if you are on grinmint or sparkpool, you have to SET EMAIL and you have no need to fill the username.