A lot can definitely be done with mods, but one thing to bear in mind as far as draw distance goes is that, if I'm reading correctly, the game engine basically is designed to be compartmentalized, so I'm not sure how much you can do. I never particularly noticed it draw distance being a problem in this game, but if you're talking about stuff like when you look at the mountain from the town it's effectively simulating that view. What you would actually have to do is modify the map itself and increase detail rather than adjusting a draw distance setting. And you'd have to do that for every map...