The listings give details of the locations (Web Site Locations) for a particular HR aircraft skin. They may not detail the actual originator of the aircraft model, unless that model is still in it's original form. The readme files should give a full history of the model concerned, including the originator of the 3DZ files.
The screen shots are the 3DZ model with the HR skin applied. These skins may not be those of the originator of the 3DZ model.