i sucessfully made a back-up for myself using Nero 6.6 and verbatim media by creating an image of the original and then burning a new DL DVD from the image, but i had some trouble at first..
my 1st attempt with verbatim media was sketchy - some times it worked, sometimes it didnt.. so i tried memorex and my PC wouldnt even burn to it..
so after some digging around, i found new firmware for my dual layer burner(NEC 6500A).. after loading the new firmware to my drive both verbatim and memorex work flawlessly..
good luck..
my 1st attempt with verbatim media was sketchy - some times it worked, sometimes it didnt.. so i tried memorex and my PC wouldnt even burn to it..
so after some digging around, i found new firmware for my dual layer burner(NEC 6500A).. after loading the new firmware to my drive both verbatim and memorex work flawlessly..
good luck..