Here, it is only a normal .zip file, packed with a normal zip program, and also unpackable by one (if you know the password )
The file size is decreasing by the way of packing the data. Maybe there is a special way that you have to use for this "plugin", but it is definately zipped..

The "resource files" of the pro edition are a bit different from that, because they can include all your data without setting any password or using a zip program.
But apart from that, the implementation of Lion_ts's system is that easy that you can say it is the same as in the pro edition, maybe even better than that because you can set your own password and also view your data at any time without any problems.
If i understood it right, the system just unpacks the data and stores the content in the engines virtual data space, so that it is usable.

In this way, thank you a lot, Lion!
Sinthoras