Hello, I have used this software and it has been very useful to me, I am a surveyor engineer and free software user. A year ago in the world linux have agreed to generate universal packages self-contained with everything they need to install on any linux distribution. Simon Peter's appimage, the advantage of these packages is that they use everything in the same package to work, libraries and so on. Hence they can be installed in any linux distribution.
It would be great to see the PSPP in appimage , and avoid using the terminal for new users. I somehow defend myself with the terminal but sometimes it is still somewhat annoying and tedious. I leave you the links of these new packaging technologies, so that you can analyze them and may in the not too distant future offer some of these simple packages. In fact I prefer appimage, I downloaded several of these applications with this type of package and is simple to use and distribute.
Appimage has its own charm and does not use the terminal but right click on the icon, properties and run as application and go.
Thank you
http://appimage.org/