So far as I know, yes, the mechanisms are interchangeable.
The interior parts out of your old four door should also transfer over. The motor for the tail gate is the same as that used in the doors.
The head liner is a two piece if I remember correctly. You would use the front half off a four door and cut off the part where it would drop down for the sail panels (it is cut off before you ever see it, it isn't a matter of you getting out your scissors). There is then a painted stamped steel rib that goes across the car to hold up the front half and the back half of the headliner is unique to a long roof.
Side panels for the rear are also unique.