I felt intrigued, because I own the multilingual Pompei DVD, and Italian is one of the languages on it!
So I again copied all the DVD files to my C-directory on my Windows 8.1 desktop, copied the 'NQ_ATGSF.exe' patch to it, and when I started it, I got an ITA language option, as shown below in the lower left-hand corner. So I hit the green button:
(for bigger images, right-click on them and select 'View Image')
And lo and behold, it worked: I got the Italian menu, and was able to start playing the game. I could also save the game, and yes, there is a '_backup' subdirectory for it. See the screenshots below (images uploaded to TinyPic, by the way):
Saving the game: Ti auguro buona fortuna!
P.S. I happen to really love Italian educational multimedia by companies like Capware, Altair4, Tipot Studio, De Agostini and Scala (in collaboration with L'Espresso magazine). Though I don't speak Italian, I manage to piece together enough Italian to find a number of those CDs, DVDs and books online, order them, and enjoy them.