My guess is that they are not in the book, although FabianX was a contributing author. The book is not due out till October.

This utility isn't really a script, per se' , it is a graphical interface that performs the steps for remastering (creating a master / source directory, copying the files to them for remastering, chrooting into the development environment). I just finished my last remaster a day before this utility came out, but it appears that it makes remastering much closer to a "no-brainer".