Have you tried YUMI? https://www.pendrivelinux.com/yumi-multiboot-usb-creator/ https://www.pendrivelinux.com/yumi-multiboot-usb-creator/ I've used it to succes

Have you tried YUMI? https://www.pendrivelinux.com/yumi-multiboot-usb-creator/ https://www.pendrivelinux.com/yumi-multiboot-usb-creator/ I've used it to successfully boot into both Windows and Linux. Although it's is only available for Windows, there seems to be a Linux counterpart as well, which I've never tried out: https://www.pendrivelinux.com/multiboot-create-a-multiboot-usb-from-linux/ https://www.pendrivelinux.com/multiboot-create-a-multiboot-u...