distroflash.lua is a script that creates multiboot usb disks from linux distro .iso files. It requires libUseful, libUseful-lua, lua-5.3 and syslinux.
ReleaseNotes
major feature: Version 3.0: Added distros: Deepin, ZorinOS, Manjaro, Slackware. Automatically 'modprobe loop'. Initial work on supporting distros that install from a .iso file without that being unpacked.