Comment: Image Gallery and Image display

I am desparate to get a gallery up and running on a new YACS powered site, can't find any way to do it on my own This is the first time I've used YACS and I used it because I thought it had an inbuilt gallery - I can't find it. I'm using 8.3beta31.1. I also downloaded the gallery mod but there is no installation instructions and I'm not yet familiar with the YACS file structure, where do I put it? Sorry for so many questions, but it's driving me crazy.