Hi nosechanger,
The answers to your questions are yes. There are techniques that can make your lateral nasal alae smaller so that when you smile they do not spread so much. Your lateral nostril may be a little smaller, but still retain a natural appearance. A wide nose can be "brought in" without it appearing unnatural. One must maintain the nasal dorsal line which runs from the medial edge of the eye brow, down to the defining point of the nasal tip. It is more difficult to achieve excellent results in patients with thick, oily skin.
I would favor an open or external approach rhinoplasty to achieve the results that you desire. The changes that you are inquiring about involve advanced rhinoplasty techniques. You should research and choose your surgeon most carefully. Much good luck and be well.
Dr. P
