You need a cargo airport connected by factory connection to a soace for vehicles/containers. You can deliver to the space by trucks, trains, maybe even ships

I can't seem to figure out how to load vehicles/containers onto the plane?

Отличная работа!
Очень не хватает еще таких легендарных машин, как ЯК-40, ИЛ-62 и ИЛ-86. =)
Ждем еще новых интересных работ!!!
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Great job!
We are still missing such legendary cars as the YAK-40, IL-62 and IL-86. =)
We are waiting for more interesting new works!!!

Muito bom! Obrigado pelo mod, camarada

Well we already have some of this planes, you guys can ask other modders to adapt their script or make a new option... but as i said i'm noobish at blender so i don't plan new ones.

Can you make more flatbed versions of other planes? Like C-130, Boeings, or Antonov?

Wartburger yes, only container and brand new vehicles, game mechanics are not there yet.
About new planes, i'm not a 3d modeler so i don't plan new ones, but it is just 3 lines of script, should be easy to adapt other planes.

Can't help you with what the proper size should be, but it is a great idea. Are we getting other similar conversions?

(suggestion: pretty naming - e.g., Il-76 (flatbed))

Is it only for "brandnew vehicles", or can it transfer used vehicles too? Same problem as trains or helicopters.

Ty Jacob, i'm on modder's discord already.
My concern was to make the capacity appropriate but after looking for the real plane capacity it looks right. Bigger/more payload would just need a bigger plane.

Great mod