What is the import feature used for?

[devicode]

What is the import feature used for? How does it work?
We looked at it to place files to import into the puzzles but the only extension you can get is .pzg.
So we're not certain how to use this feature.

[devicode]

The import feature allows you to add preconfigured puzzles to Jigtopia.
You can purchase these puzzles from our web site, http://enuffgames.devicode.com/order.htm.

Several pictures are packaged in a group, making it easy to imported them into the program and immediately begin assembling them.
You can modify any of these puzzles to make them earier or harder to solve.