Aeromods on a suspension mountain bike would be a waste of energy. You can make your bike faster with the tires like you did and by losing the front suspension fork.
Truly if you want to go faster, get you a road bike. You don't need an expensive carbon fiber bike, but a road bike with drop bars, 27" or 700c wheels, and the lighter weight will allow you more speed and more aero naturally. THEN you might consider aeromods.
This is my commuter bike. I like the upright position for visibilly in traffic. I did a 700c wheel conversion and road bike brake conversion on it since it was a 26er mountain bike. Average speed according to my computer is 12 mph on my 10 mile commute.........
This is my road bike. I also commute with it on days I do not need to pack a lunch. Nothing fancy or expensive but the average speed on this bike is 15 mph.........
