hey SpoorObjecten,
I contacted olaholdor how to use the tool, he’ll try to make a short tutorial for you, see the reactions here:
Participant
@olahaldor
Could you help Spoorobjecten with implementing his trains in Train Fever? He actually needs something like a tutorial how to use the converting tool for implementing the trains into Train Fever. Really hope so 

olahaldor
Participant
I’ll make a tutorial in due time. But some parts of the stuff like BoundingBox is a bit of a mystery yet. Placement of bogies is a bit of a mystery as well.
I could probably make a tutorial on how to do the stuff needed to make the model and texture appear, and then update when I know more about those special, weird snippets of text which is individual per model.