Claro, puedes agregarle lo que quieras, siempre y cuando no lo publiques, puedes usarlo en un mundo solitario o server con amigos por supuesto.
De hecho yo añadí un portaaviones, pero no puedo publicarlo ya que no tengo permiso

When I created it I used the mcheli mod, but it's not necessary to load the world so you can enter it even if you don't use any mod

For the map I used the journeymap mod, and used the world mapping option.
About the packages, I haven't seen any so far, sorry.

I guess you are a Mac user, for that system the installation is more complicated.

You have to enter this link de tu documentos (.minecraft/mods/mcheli/assets/mcheli) inside there are several folders that make it possible to add new vehicles to the mod.


You must enter each folder with the same name, copy the content that is in the package and paste it to the one in the mcheli folder of the mods folder, some files replace some files, so you must accept when the window appears to confirm the replaced one. In this example the "planes" folder is shown, you will have to do the same with the other folders in the package.


PS: the folder "models" and "textures" contain subfolders, you will have to open it, copy the content of each one and paste it to the corresponding subfolder in the mcheli folder of the mods folder.