I tried another plugin first that offered many visual options, which frankly would have been nice. But wouldn't you know it? It wouldn't work.
So my other choice also picked at the same time was this plugin. Just a fluke I turned the other one on first.
Got this one up and working, displaying nicely on the 2nd try. I would have got it on the first try if I'd noticed how short the height was set for.
If I could put out a nice wish, was to have it pop out into a light-box - to really focus all attention on the images.