Format a USB-flash for multiboot. Bootice (select usb flash drive) > Parts manage > Re-Partitioning > USB-HDD mode (Single Partition) > File System FAT32/NTFS (FAT32 does not support files more than ...
liveusb-builder is a script suite to create multiboot USB stick for GNU/Linux distributions. It's lightweight with few dependencies, and it's extensible and hackable ...
Jesus Vigo reviews the process to create a mutliboot USB drive used to install multiple versions of OS X. In an ideal world, sysadmins everywhere would only need to manage one or two operating systems ...