mbr_store
This tool stores up to 426 bytes in the MBR's bootloader code section of unused devices such as usb drivers, hrd disks (which are not supposed to boot) and other media. GRUB detection is implemented for safety reasons, Windows bootloader code will be shamelessly overwritten.
INSTALLATION
make
sudo make install
make clean
FIRST STEPS
Get yourself a copy of your own MBR with
dd if=/dev/sdx of=my_mbr.img count=1
or use one of the provided samples in doc/.
Read, store and check your results with your favorite hex editor (e.g. g
hex2).
Be careful to not demage your bootloader!
Run fdisk -l or dmesg to determine the correct device 
AUTHOR
atzeton
nullsecurity.net
LICENSE
GNU GPLv2+