title Del mbr on all hards except this flash
if %@root:~1,3%==hd0 && echo > (hd1)+1 && echo > (hd2)+1 && echo > (hd3)+1
if %@root:~1,3%==fd0 && echo > (hd0)+1 && echo > (hd1)+1 && echo > (hd2)+1
kernel || pause Done!