KPKFile
Freeware
http://www.geocities.com/john52612000/
Win95/98/ME/NT/2k/XP

With a simple and familiar interface, this application is
designed to keep your private folders and documents safe from
prying eyes. It comes with two separate functions, including
file encrypting and wiping. File encrypting and wiping packs
files into a binary code that can be hidden inside another
working file. Private folders let you store a grouping of
subdirectories in tree form. This program sets itself apart
because it can be run outside KPKFile and still hide pre-existing
folders. Encoded programs are also password protected.