Here we are.
To make a disc is sufficient to burn all vob anf bup and ifo files produced by dvd shrink on a dvd. You can use any dvd burning software; I prefer nero because is simple and reliable (but it's only my opinion).
To obtain an image file with shrink is very simple.
1) Press backup button
2) Choose from the drop down menu the option ISO image file
3) Choose a path to write the image file
4) After shrink finish to write the ISO file, open DVD decrypter and burn on a DVD.