IMG and ISO files are complete images of physical media such as
CD-ROMs, DVD's, floppy disks, etc. that contain all of the files
and folders in a particular package. To install any software
package from an image, the image itself must first be "mounted"
by the Operating System. This can be accomplished by: Burning
the image directly to DVD making sure to specify the source type
as "image". Once the burning of the image is complete, the
physical media can be inserted into the computer and will be
recognized like any other DVD. You must have a writable DVD
drive. Burning the image directly to a USB thumbdrive. This is
particularly useful for those people who have Netbooks or other
computers without a writable DVD drive. "Mounting" the image as
a virtual disk using third party software. Mounting refers to
the process which makes the files and folders in the image
visible and usable to the end-user. You do not need a physical
DVD drive. Note Burning the file to a disk as a "data disk" will
simply end up with a .i