Hi wm.franceschini and welcome.
Yes, you can use shrink. I'm guessing you're talking about dvdfabdecrypter v.126.96.36.199, which will rip the entire disc only and has no burn application. The retail versions of fab are complete and will burn also.
Express will always compress, unless the file size is smaller than an SL disc or you have enabled DL burning (make sure DL burning remains unchecked if you want to compress).
Gold will never compress and will always split to two SL discs unless the file size is smaller than a SL disc or you have enabled DL burning.
Platinum is comprised of express and gold.
Hope this helps.