From the version 1.0beta21, the NPCmap can be generated on the fly and in one click in the NPCMap panel, so you dont need to use xEdit Script anymore.
You can also directly load all master for a given esp also in one click, so you can build the NPCmap with all inherited references, if they are needed.

-Now open xTranslator,
-Go in the npcMap tab (8) at the bottom, the npcmap/fuzmap will be automatically generated.
-You might need to also load the masters esm for the current mod, clivk on the secund button (not shown on the picture)
-Now you have a complete list of Npc linked to dialog
-If you activate the NPC filter on top (10), you can select an NCP in the npcMap (11) and see all dialog spoken by that given NPC.
-Also when you edit a dialog, you can see which NPCs are using it (12).