Newbie here... I want to make a backup copy of my Toyota Nav DVD just in case it's ever damaged. It's dual layer so I went and purchased Verbatim +R DL. I have DVDShrink and Decrypter...now what? It's not a movie so there are no .vob or audio files. Do I save to an .ISO file? If so, then what do I do? I know you are laughing because I'm a newbie but please, I really want to understand how to do this. I've burned a few Disney movies and rentals before but nothing ever like this. Help...please!