This system is somewhat complex.
For this reason I did not write a tutorial, I just created a demo to be analyzed.
In this example there are 5 vehicles of each type:
5 terrestrials (Boat converted to land)
5 water vehicles (Ship)
5 Airships
How it works:
Each vehicle is a map event that calls the respective vehicle through commands.
The limitation of this system is that you can not enter another map with the vehicle, you can only use in World Map (Field).
Exporting to Rm2k:
In the folder Rm2k3-More_Vehicles delete the files and folders:
RPG_RT.exe
More_Vehicles.r3proj
ultimate_rt_eb.dll
Frame (Folder)
System2 (Folder)
Create a new project for Rm2k, copy all the files that were left in the Rm2k3-More_Vehicles folder into it.