Is few time i still take alook to mangos/trinity core and i've discovered that some quest chain are not doable in blizzlike way cause there are some missin feature in the core and in the related quest template database.
I've posted some thought on trinity Dev place but i think can be useful also for Mangos quest mechanics
this is the link http://code.google.com/p/trinitycore/issues/detail?id=1677 to my idea.
Feel free to comment if i still missing some point or if my discovering is a real limit of the actual quest system engine.
ty
ExP