Your DVD is too big to fit on a DVD Recordable.
Shrink rip your DVD but also reduce it for you.
That's why you can't burn directly the ISO that you have made with DVD-Decrypter.
For bypass the ARccOS protection, just make an ISO with DVD-Decrypter, then in shrink press ctrl + i (or click File->Open Disc Image...) and finally choose the ISO you've just made.
Now you can "Shrink" it.
Alternatively, you can do it in file mode for both DVD-Decrypter and Shrink.
Last thing : Try a CCE encoder instead of Shrink (like DVD-Rebuilder for example), it gives better quality on huge compression.
Anyway that's not the purpose of this forum