Dear All (pardon my English),
Recently I found that mr. Al Morse (USA) has made substantial additions to the Friesach sample set, see http://almorse.net/content_freeorgans.html. He recombined and andjusted the existing sound files and turned it into a larger organ with a lot more couplers and other bells and whistles. He even included the Ghent carillon set.
However, this version is only accessible through Hauptwerk, which is regrettable. Would anybody know if it's possible to create an ODF file for this expansion? It'd be the largest GO-set out there... If it's possible, I would be very happy to write him and ask for permission.