Thus, if necessary, {TAIL ~ any additional code} will be loaded and run immediately following {HEAD ~ the boot sequence} 
Thus , if necessary , { TAIL ~ any additional code } will be loaded and run immediately following { HEAD ~ the boot sequence }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD