Starting Napoleonic Wars

I recently bought Mount and Blade: Warband and the DLC Napoleonic Wars on steam. I love Warband, but I can't figure out how to start Napoleonic Wars. I might just be stupid but I don't know what to do. Do I access it from the Warband menu or access it from steam? I just can't figure out how to play napoleonic wars.

Start up Warband, click on the Warband module and NW should be in the list with the other modules.

Actually, with this information useful. Knowledge diverse lot.