I've just tried the function "wiki course format" but I met a main problem :
There is no "view-discuss-edit-navigator-etc" tabs above the wiki on the front page (see attachment), so one's can only read it. Is there something to do to get those functions on the front page, like it is on your demo site (http://morguapu.upc.es/crom/course/view.php?id=2) ?
Or we won't be able to use it, as the main purpose of the wiki is to edit it, not only to read it !
We've just updated a few days ago to the latest Moodle versions : 1.9.4
Thanks for your help