Implementing jquery-popbox

I would like to implement the popbox from http://gristmill.github.io/jquery-popbox/ on my wordpress site. Ive tried for hours and cant seem to figure it out. If someone would be so kind to save me from wasting even more hours id be most gracious. I guess I just need a step by step guide. Like first download the zip then so on and so fourth, whatever you think will work.