break
in portuguese forum have one incomplete guide showing exactely how to do that.
need big space cos first you have to rip the dvds one by one with dvddecrypter,but is secure cos solve the sincro audio issues when mixing differents dvds
you choose the chapters or the main movie that you want and in the end build a big dvd structure to do your project or to burn if you have a dual layer driver. Italian to/from Portuguese can be read...can you read portuguese? follow the pictures, is the easy way.
http://www.kvcd.net/forum/viewtopic.php?t=14681