You want to send somebody a zip file but he may not know what a zip file is? No problem, send him a 12Ghosts Zip2? self-unpacking file. This doesn't need any special treatment, no sophisticated knowledge, no extra programs. Everybody and your Grandma (with all due respect) can double-click the file and have all included documents displayed in a folder. All files will be there as if they were sent uncompressed!