Probably not that easy - most maps are probably 'compiled'...reduced to a single object, not a set of distinct objects.
I remember in NWN you could add new objects to pre-existing maps, but couldn't do anything with the 'compiled' maps themselves.
But certain maps should probably be looked at. I'm surprised the new Drozana doesn't have chairs you can click on.
[Louis Cipher][Outta Gum][Thysa Kymbo][Spanner][Frakk]
Joined October 2009. READ BEFORE POSTING
Well, I would certainly say that the devs' priority for "updating every chair in every map in the game with a click-to-sit function" is definitely higher than, say, "making epohhs fly over the moon in a reverse V formation."