Expand file to a [multi]boot drive, typically a USB pendrive
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These UEFI-n-BIOS-grub-n-iso compressed iso files

1. dd_lubuntu-14.04.2-desktop-i386_4GB.img.xz
2. dd_ubuntu-flavours-multiboot-G_7.8GB.img.xz

contain


1. A system for a 4 GB or larger pendrive

- that boots via grub in BIOS as well as in UEFI mode

- a Lubuntu iso file, lubuntu-14.04.2-desktop-i386.iso

- a casper-rw partition for persistence.


2. A system for an 8 GB or larger pendrive

- that boots via grub in BIOS as well as in UEFI mode

- the following iso files
kubuntu-14.04.2-desktop-amd64.iso
lubuntu-14.04.2-desktop-i386.iso
ubuntu-12.04-desktop-i386.iso
ubuntu-14.04.2-desktop-amd64.iso
ubuntu-mate-14.04.2-LTS-desktop-i386.iso
xubuntu-14.04.1-desktop-i386.iso

- a casper-rw partition for persistence.


Use mkusb to expand and flash the compressed iso files into USB pendrives.

Notice that 32-bit as well as 64-bit iso files can be booted in UEFI mode,
so a pendrive made from 'dd_lubuntu-14.04.2-desktop-i386_4GB.img.xz' can be
used in most PCs with Intel and AMD processors, from very old 32-bit PCs
to new PCs running in UEFI mode.

You can edit the partitions with gparted, for example change the sizes,
in order to use the whole pendrive, if it is bigger than what is expanded
from the compressed image files (4 GB or 8 GB). The casper-rw partition
can be moved without creating problems. The fat32 partitions size can be
changed, but its head end should stay where it is.

There might be problems if you use the casper-rw partition for different
iso files and install program packages. Data files can be shared without
problems. If the persistence is damaged, you can always remove all files,
or simply format it (make a new ext2 file system).