Oh my… what a mess. The current state of the Linden 360-viewer is for the geeky only. The instructions for setting up to display these images, via web or just on your local computer, is described in a Bitbucket thread: JS 360-snapshot-web-viewer and the SL Wiki.
No problem. Just install Python and set up a simple web server… As Ebbe has said, “Who the f**k installs servers?”
The instructions on both the sites assume you know about web servers and tech. But, all the needed parts are in Bitbucket.