Greybox, noob!

[daannneee]

Hi all. Okey so i´m a complete noob when it comes to this.. Anyways!
I have used lightbox earlier, but i´m going to try out Greybox instead, i think it looks better..

http://orangoo.com/labs/greybox/installation.html

So, the question is, how to do?
The manual on the website doesn´t tell me anything, because.. as i said, im a noob! :P