Online Choose your Adventure, offline.

[Vodoun]

Hello, I recently came across this cool online "create your own adventure" website that gives source codes and what not to set up the same system on your own pages.

The question I have is, if I just wanted to use this program for my own personal use, is there a way I can set it up and use it for purely offline purposes?

Here's the website: http://www.iamcal.com/games/choose/source.php

Also, is there a simple way to make it possible to add a 3rd, or 4th option? Sorry if the question is really broad or generalized, I know nil about web design or programming.