Broken Sword: Shadow of the Templars Director's Cut - Bonus Comic

How do you unlock all of those bonus mini comic strips that tells of the back story regarding Nico's past?On sites like GameFAQs they say you just have to finish the game to unlock them but I've just finished the game and I was only able to unlock three of them. And as far as I can tell I unlocked those three by doing some random actions that results in a goat's "baah!" sound effect, one of which was at the Carchon's library when I kept looking at the books on the shelves.

I found the below info from a 2010 post made by 'PLASTICA-MAN' at "forums.gametrailers.com", which will trigger that goat sound;

1- For the first one, you have to examine the bookshelf twice at the beginning of the game with Nico.
2- For the second one you talk with Guido about the metal rod in front of the hotel Ubu.
3- For the third one, use the METAL ROD (suit of armor) on the tripod display case in the Crune Museum
4- For the fourth one, you talk with Khan about the metal rod when he is going to kill you on the top of the bull's head.
5- For the fifth one, you use the metal rod on the skull on the door located under the sewers of Montfaucon.
6- For the sixth and last one, use the METAL ROD (suit of armor) on the suit of armor in the de Vasconcellos entrance hall

Thanks prectorian :DSo now I'm off to replay the game from the beginning again.