Test the dvd on the hard drive to make sure it is playing correctly after you process it through CCE, but before trying to burn to a disk. Play it with VLC media player, or whatever dvd-video player you prefer. How exactly are you using CCE anyway? DVDRebuilder perhaps?
To make an ISO of the resulting dvd, use ImgBurn. When you start ImgBurn click on Create image file from files/folders
By the way, DVDShrink is horribly outdated as a ripping/decryption program. I suggest you go to DVDFab HD Decrypter. It is the free section within DVDFab and will continue to function even after the trial for the main part of DVDFab expires.