If using linux:1. Find your output device (usb flash drive in your case) by looking into /dev while inserting and removing drive
2. 'dd if=<path to your mbr flat binary file> of=<path to the usb drive e.g. /dev/sdb> bs=512 count=1'
If you are using VMware emulating Linux on a Windows machine:1. Forget about it, just brings you pain.
If you are using windows:1. Download dd for windows here
http://uranus.chrysocome.net/linux/rawwrite/2. Find your output device (usb flash drive in your case) by using 'dd --list'
3. 'dd if=<path to your mbr flat binary file> of=<path to the usb drive e.g. \\.\PhysicalDrive2> bs=512 count=1 conv=notrunc'
Be very careful when using dd !Regards,
StaringL