How To Make A Bootable USB Flash Drive

Learn how to make any bootable CD or DVD bootable on a USB flash drive. This process allows you to quickly and easily create bootable USB flash drive copies of important software, such as Microsoft Windows, firmware update utilities, and various Linux operating system distributions. Most CDs and DVDs that are bootable in a native environment can be made bootable on USB with the Universal USB Installer utility by Pen Drive Linux.

See: Universal USB Installer – Easy as 1 2 3 | USB Pen Drive Linux

Very useful video. The only possible issue I see is people may have to go into BIOS and change boot order. A lot of USB external hard drives have problems if USB is before system HD. If you needed to boot from USB copy of Windows and had been using a USB external you would have to change the boot order before Booting from USB stick.
Joe