I purchased ILO DVD recorder model dvdr04 so I could record two vcr home movies of my grandmother to dvd. I want to edit the movies and shrink them to one dvd. When I try to use dvd shrink to re author and store locally so I can edit and burn using Roxio 6, I get the message "Invalid DVD Navigation Structure". Any advice is greatly appreciated as time is running short because I wanted to get this done before Christmas. Thanks.