How to Write to a USB Boot Sector
Writing boot sector information to your USB drive will enable you to create a "bootable" USB drive, enabling you to place your system into DOS as opposed to loading the operating system currently on your hard drive. This is accomplished by "stealing" a boot sector file off of an existing boot floppy using the unique "mkbt" freeware utility.
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Instructions
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Insert the blank floppy into your computer.
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Click "Start" and click "Computer."
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Right-click the drive letter of the floppy and select "Format."
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Check "Create a MS-DOS Startup Disk" and press "Enter."
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Click "Start," type "cmd" in the "Search" box and press "Enter."
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Type "mkbt -c a: bootsect.bin" and press "Enter," replacing "a" with the letter of your floppy drive.
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Type "mkbt -x bootsect.bin n:" and press "Enter," replacing "n" with the drive letter of your USB drive. This will write the boot sector to the USB drive.
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