What nobody mentioned is that DVD Shrink hasn't been updated in over a year and isn't able to rip all movies.
If you are intent on ripping and writing a number of DVD movies then you need to consider buying AnyDVD to rip the movie to a folder on your hard drive and CloneDVD 2 to burn the movie to DVD. Both programs are made by Slysoft. If shrink isn't able to shrink the movie then you can use CloneDVD 2. It allows you to remove the parts that you don't want to keep.
Having said that, when shrink won't shrink a movie, I generally write the whole movie to a Dual Layer DVD+R.
I currently rip and burn my movies in the following manner.
With AnyDVD running in the background (if you allow it, it always runs in the background), I use DVD Decrypter to rip the movie. You can simply copy the video contents folder to your hard drive however; I find that DVD Decrypter gives me a better idea of what is contained on the DVD.
Next I attempt to shrink the files down to a single movie. Remembering however; that Shrink no longer is updated and no longer is able to shrink all movies.
After shrinking (or not) the movie files, I use CloneDVD 2 to write the movie to either a DVD-5 (a single layer blank) or a DVD+R DL (a dual layer blank).
On the following page of mine, I have a short guide to burning a shrunk movie using CloneDVD 2:
If you access SlySoft to purchase AnyDVD and CloneDVD 2 from the cdfreaks site you will get a discount on the cost.