It is configurable in NPC XML file. Just add there "speechbubble" parameter into "<npc>" node and you will be able to configure it.
Possible options:
Code:
SPEECHBUBBLE_NONE = 0,
SPEECHBUBBLE_NORMAL = 1,
SPEECHBUBBLE_TRADE = 2,
SPEECHBUBBLE_QUEST = 3,
SPEECHBUBBLE_QUESTTRADER = 4,
Just set it to the one of the values listed above, like "0", which is "none", till "4" which is "quest trader".
Example:
Code:
<npc name="Eryn" script="runes.lua" walkinterval="2000" floorchange="0" speechbubble="2">
Regards,