"Funny" you wrote this. I came back to the thread to ask about this add-on I enabled this evening. However, I am not sure how it downloads the extra fan art? I even created the folder just in case, but no new fan art downloaded.
Any tips/instructions you may give?
It should create the folders by itself.
One very important thing is that all movies/tvshows must have their own folders. If not it won't work.
Then go to the add-ons/programs section and change the settings to your preferences. Now you can exicute the add-ons to dwonload all in one time or use the skin 'get extrafanart' options.