That drop ship was done in 2006, it didnt use a mod. The helicopter by s4real in the other thread currently running didnt use a mod either and the whole idea revolved around the method of entering a dynamic entity with collision which at that time was no mean feat, even now you will find its not as easy to do as it looks, it requires a complex combination of modeling and scripting.
Using the method you show here I have no doubt you can ride on the wings of the plane if you have collision enabled on the entity, but then you wouldnt be able to get inside of it, you would have to disable collision and freeze the player to the platform to prevent them walking off it and through the walls of the aircraft.
The real trick is allowing the player to be inside a moving entity and still have freedom of movement wth collision against walls.
A Mod has been erased by your signature.