[ Reposting the answer ]
Sorry I took so long to reply. Have you managed to install BeautifulSoup correctly?
The easiest way to install bs4 is by using pip (it is a tool for adding packages to python). The trouble is.. you have to install pip first. The way to install pip depends on your platform, but a quick google search on how to install should solve it for you. (ie. for windows, this answer on StackOverflow http://stackoverflow...-pip-on-windows)
After that you just do pip install beautifulsoup4
The way to test if you have installed it correctly is by opening up a Python interactive console and doing: "import bs4" if that doesnt report eny errors then you have succeeded, after that the script should work.