Thanks for the link… I almost didn’t recognize my theme on your site; but I like that because it shows that someone is getting more creative 🙂
Anyway, if it’s the slideshow you are referring to, the tutorial for that part is here:
https://www.styledthemes.com/encounters-theme-setup/59-setup-a-widgetkit-slideshow-for-the-front-page
The live demo for Encounters is using the Widgetkit plugin (which is actually a combination of different plugins rolled into one). The one used is the slideshow one. Widgetkit is free for the Widgetkit Lite plugin (which is what I am using).