[room217au]

A good rule of thumb is copy all 3 files for each truck into your mod folder.

A word about the resource parameters.
(mm_max_tmp_buffers_size / mm_max_resource_size) – 1 = number of temporary loading buffer(s)
The bigger the max_resource_size, the bigger the RAM chunk(s) allocated for input of models (trucks, trailers, maps, etc)
The larger the tmp_buffer_size, the more loading buffers available at one time. This refers to the number of resources loaded at one time.