It was saying that lifeless objects are now handled with the alignment group. So you give it an enemy ID, then you set it to a group defined as a lifeless object. Remember, just about every question is answered in the manual, READ the manual before you ask for help. If a term doesn't make sense, read the section of the manual that explains that term in depth, rather than asking us to explain it better than Blizz did (which is difficult, seeing as it's his script).