This is honestly an excelent Idea! I haven't used it, but wouldn't Oblivion's Construction Set work better though? I mean, it's basically a more advanced Morrowind, right? I've used morrowind's Construction set, so yeah, I know it would be possible... I think it'd be really great if the game was expanded as well though... For example, if you could enter more houses, use more items, and have all sorts of new sidequests, this could end up being a really cool game. I would use the graphics from morrowind, or maybe custom graphics, because there wouldn't be much of a point if you just ripped the graphics straight from OoT.