You'll need to download the ISO files for the operating systems or utilities that you want to include on the USB drive.
You can also use YUMI to create bootable media for Windows, rescue disks and FreeBSD as long as you have an ISO image. YUMI ( Your Universal Multiboot Installer) is a tool used to prepare USB drives to boot different operating systems such as Linux. Bootable drive creation utility which can multiple boot options including Linux, Windows, Antivirus and other utilities from ISO images.
