OK....
The simplest way is with TmpgEnc DVD author 1.6 (
http://www.pegasys-inc.com ). This software will rip the DVD in mpeg2, allow you to edit and re-author, and finally burn the DVD to Nero or other ...
Otherwise, DVD Decrypter will rip the w hole dvd to your HD.. Then, you can edit with the above program, or use a VOB editor (
http://www.dvddecrypter.com )