Hi Glad,

    Specifically, you would open your .Grain/ directory where the wallet.dat lives and place the file there and then start Grain's daemon with a -loadblock=bootstrap.dat there.
    So first rename the file to be bootstrap.dat and then put it into the coin daemon's directory and then start Grain w/ the -loadblock argument as specified.

    You'll notice it starts reading the file and processing blocks immediately and then once it has finished, the file gets automatically renamed to be bootstrap.dat.old.

Best Regards,
-Chicago