MBR .. dovoluje bootnut hocktoru zo 4 primarnych particii
Program je len v mbr teda ziadne ine data. (444 bytov)
Je to klasicky mbr pre debian a .. akurat cez binarny editor mozes
zmenit parametre ktore su pri konci:
<90><C7>^R<80>
napr na <90><C7><FF><80> pre nekonecne cakanie na vyber.

flags:  db 0x90 ! Floppy bootable. Advanced mode available.
def:    db 0xc7 ! Interrupt by anything.
delay:  db 18 ! About 1 second
drive:  db 0x80 ! /dev/hda1

! Setup the flags to mimic standard MBRs unless interrupted
! flags:bits 0-4 marks partitions 1-4 and floppy bootable
!       bit 7 = unlocked
! def:  bits 0-2 default boot partition (0-4 or 7=active)
!       bits 6,7 interrupt on (shift/ctrl,key press)
dd if=mbr.b of=/dev/hda of=/dev/hda bs=444 count=1
ale predtym si radsej zzalohuj povodnu ... ak by som rozsahal 
napr tabulku particii ;-)