Simple way to create a bootable windows 7 usb stick:
$ sudo apt-get update
$ sudo apt-get install gparted - insert usb stick
- format it as ntfs using gparted
- in case it’s not set, go to Manage flags, and check boot
$ sudo mount -o loop your.iso /some/mount/point - insert usb stick again so your ubuntu can remount it
$ cp -rvf /some/mount/point/* /media/wherever/ubuntu/mounted_it - wait
- reboot, and select your usb stick as your first boot device
- done!