Multiple exposures, set the camera for continous shutter release in order to avoid ghosting, then remix the photomatix result back into photoshop with the original nef raw images to correct certain things.
I attached screenshots to show you. AEB +2, 0, -0
all my shots are AEB raw+jpg high
When doing AEB you have the options of taking +2,0,-2 or +1,0,-1 is single shots shutter release or in rapid mode continous release where you press the shutter and all 3 shots will take rapidly one after another
so you get your +2,0,-2 within seconds of each other.