It is possible to create multiple fully-installed linux installations on a single E2B USB drive by creating image partition files (.imgPTN files).
We can do this by making fake 'blank' partitions on our E2B USb drive (.imgPTNfile) and then using Virtual Box with DavidV's VMUB utility to install linux onto it.
Use the latest MPI Tool Pack (v.0.054 2015-08-21 or later). This includes CSM menu support for grub2/syslinux installations on the 3rd partition.
We can do this by making fake 'blank' partitions on our E2B USb drive (.imgPTNfile) and then using Virtual Box with DavidV's VMUB utility to install linux onto it.
Use the latest MPI Tool Pack (v.0.054 2015-08-21 or later). This includes CSM menu support for grub2/syslinux installations on the 3rd partition.