The LCVP, widely known as the Higgins Boat after Andrew Higgins, the designer of the boat. They could carry 36 people or a jeep, and carried a crew of 3. Armament was a pair of .30 M1919 MGs.
The crew positions.
Looking in the front.
Edit: Unless I suddenly have a lot of time in my hands, I will not be making instuctions for this. I was unable to when I tore it down to rebuild it more to scale, but as it is still awaiting some parts you may see some instructions as summer rolls around.