I've never modded for NWN and therefore do not know the Aurora Toolset at all but you make it sound as if modding for IE-games is quantum physics. Which it is not. The only real pain is making new areas (and I mean new and not just reused ones) and even that is mostly the 2D rendering of the actual picture you walk on. But everything else? New quests, new party-NPCs, new items, new rulesets, new stores and whatever else is not that hard.
Although you have to code stuff directly (but in a very basic way). That might be where the childsplay ends, I guess. As I said I never even looked at the Aurora Toolset so I don't know how one would go about scripting stuff there e.g.
Post edited November 11, 2012 by PsychoWedge