RMPrepUSB allows the Windows user to easily and quickly ‘roll their own’ multiboot USB drive. It allows the user to quickly test, partition, format, install a boot manager, extract or copy files and then test a multiboot (aka multipass) USB bootable drive. It can also make or restore an image and much more. Multiboot ‘point-and-shoot’ utilities like YUMI or XBOOT are excellent, however they don’t support every different ISO or image. You will learn too enjoy making your own personal multiboot drive using RMPrepUSB!
Also try Easy2Boot – the free MBR+UEFI multiboot USB drive project
Easy2Boot allows you to add ALL and ANY .iso, .img, .ima, .gz files , all Linux LiveCD ISOs and Windows Install ISOs (XP through to Server 2016) to your USB drive and boot from any of them. Automatic menu system. Just copy over your files and boot – no special utility required, no linux cheat codes, no special knowledge. Fully documented (eBooks available). You can change the wallpaper, menu layout, font, language, text colours, etc. to suit you.