prend la suite logicielle gratuite, Gordian Kknot
http://sourceforge.net/projects/gordianknot
quelques guides:
http://perso.club-internet.fr/cyberpic/gordian_knot.htm
http://x300.sigmatek-playayers.com/index.php?page=guide
http://www.ratiatum.com/p2p.php?id_dossier=838
http://www.divxac3.com/page/gordian%20knot.htm
http://pagesperso.laposte.net/divxtutos/gordianknot.php