Oh, for crying out loud! Is it that hard to bloody proof-read your post before actually posting? I am sometimes ashamed to be a Russian M&B player.
More on the topic, though. While the idea is somewhat nice, it is by no means a fresh one. There were some talks about implementing dual-wielding in the original game on the official forums, but there wasn't any certain result, as far as I know. I don't think such 'prupose' belongs on this forum anyway. You'd better off championing this suggestion on the aforementioned official forum, 'cause there's more chance that some kind modder will not only take notice of the idea, but will start working towards adding this feature to the game.