New NPCs... not making sense to me

[supremoleet]

I suppose I may be used to the "old" UOX way of adding NPCs. At the risk of sounding like a n00b, I'm a little confused.

I understand that I can add the NPC to any DFN in the NPC/ folder. What confuses me is the "Body ID"... I'm not sure where this number is coming from, but apparently it is not the same as the animation/character model number (which was used way back when). It appears that it is the model number of the statue from the artwork stuff, not the actual animation -- so how do I reference something that a statue doesn't exist of? Take for example, the multi-colored horde demon (0x0044). Does the number have to be the artwork/statue model number?

e.g., 0x2611 for a horde demon, instead of using 0x003B