Whilst in need of a bootable USB drive with MS-DOS for updating the BIOS on my laptop I’m stumbled upon Rufus. With Rufus, which doesn’t require any installation, you select the USB drive to use, choose MS-DOS or FreeDOS, flash the USB drive and you’re ready to go. Aside from MS-DOS and FreeDos you can also select an ISO of say Ubuntu Linux.
After it’s done flashing all that’s left to do is reboot your system with the USB flash drive inserted and you’re ready to go.