The Jigsaws use real pieces with a excellent program that has a free version for download. It is a very impressive program  http://www.dgray.com/

Our spanking jigsaws are currently located at our egroups file section which you need to become a member to access

http://www.egroups.com/files/spank_tales_for_2/

there are 2 versions present
one
the gift version
this is an .exe type file that will open up
and allow comments on opening and closing and if you don't have the program and direct you to a the web site where a free down load is available of the
jigsaw program (e.g. sending one as a gift or first time user)

two
normal version
once you have the program this is the actual jigsaw file for a picture
used in the program.
once downloaded all you have to do is open the jigsaw program and direct it
via the usual file/open to where the puzzle is stored.

overall
the jigsaw program itself is found at the following web page
http://www.dgray.com/

if you want to go there directly to the site

jigsaws galore version 3.2
1.5 M approx. to download

it is an excellent program -easy and friendly to use

a few features
free version available
use real style jigsaw pieces
offers many tools to facilitate puzzle solving keeping it fun for all
allows up to 1000 piece puzzles or any size you like
great for all types of pictures
you can covert your own pictures even to puzzles
comes with 10 puzzles of scenes