yeah i got it to work but the sand bag chair keep making me stuck and would change the size of everything inside the vehicle but only when im on the move then pop back when i stop this only happen on my dedicated server but works fine locally.

It's tedious but it's the only way I know

yeah having to change the names of all the object just take a good amount of time but was able to get 2 to work

what unites them and any script that has the name of the vehicle

Yes of course, when you copy and paste, the second vehicle generates a new name, for example if it is "Half-track1" it will remain as "Half-track1_1", what you must do is change the name of the objects in the script that attaches them to the vehicle.

is it possible to have more then one of these at once?

It is a composition, the video shows how to use it https://www.youtube.com/watch?v=kT6LwVunXXg

Hi, thanks for doing this. One question: where do I find this object in the Editor? I couldn't locate it in the SPE US Army objects.