I am looking in the source code for embparser.cpp
(Mean't to use .pl up above by the way)
I see quests/zone/npcid.pl but there is also a naming version as well fnw implemented with quests/zone/npcname
To get naming version you need the QUEST_SCRIPTS_BYNAME define in features.h to be on (looks like its on by default in 0.7.0 release).
It looks like the names have to be the same as the database minus any numbers, il tell you the top two line of this code says ( line 498 ):
//Father Nitwit's naming hack.
//untested on windows...
So you get to find out I guess
But, it by default checks for npcid.pl as well before it even searches for npcname.pl