How To Create Windows Bootable USB on Linux

You know when working on Linux, there is still some constraint that is not easy to overcome. This time I would like to upgrade BIOS for my old Thinkpad. It seems the best choice with less risk is installing a Windows on another harddrive and upgrade it. But my laptop do not come with a DVD-ROM and also I don't have any external one. So I go for USB solution.

For all Linux bootable iso can be made through command "dd" but it doesn't work for Windows Disc as the MBR is different. So what I do is make use of a tools called "ms-sys"

Software Tools needed
Windows ISO (You should know how to get it)
gparted (partition the usb)
ms-sys

Steps:
1. use gparted to clear all partition on usb drive
2. use gparted to create NTFS partition on USB, set the partition as bootable
3. mount Windows ISO, copy all files from mount point to USB. "sync"
4. Call the magic "sudo ms-sys -7 /dev/sdX" to write the MBR to USB. I used Windows 7 as the example or you may read the help of ms-sys
5. unmount everything
6. Nice and Done and you got a bootable USB

Go Go Flash Bios!!