It does not need to be the exact same model: I've replaced DVD drives on laptops and haven't run into that sort of compatibility issue. Just make sure to match up the interface type (IDE or SATA) and swap the face-plate from the original Acer laptop to the new one.
Thanks my friend. I suspected that, but wasnt sure. Then, the system is suposed to recognize it, and display it in My Computer, does it?