Right; if memory serves me right DVD santa create a folder called TempFolder or something like that in your C: drive.
Open up DVD shrink go to 'Open files' at the top, navigate to that folder that DVD Santa just created and click ok. If youve done it right, Shrink will quickly analyse the movie and you'll be able to see it on screen going very fast, then when its done analysing all the info will be on screen, all you do now is click Backup and a dialogue box comes up. Where it says SELECT BACKUP TARGET, make sure that is set to ISO image & burn with DVD decrypter. Hit ok and it'll start doing it. If you have a blank disc inserted DVD decrypter will just open and burn it once Shrink is done. If not it will prompt you.
Sounds long winded, but its the fastest way IMO and gets the right results every time. Each programme has had no issues with any DVD disc or player sicne I've been using.