Next is delete old material name and add new name.m.pbrmetal and add in the three textures, color, normal, and pbr.

The order is important and the only settings you need color set to color, normal to normal, and pbr to hardness.

I duplicate all the mesh parts to a new layer and join them into one mesh.

Delete old m.onetext it will come back due to joining.

 

Now you make the UVmap, type "U" and use second option.

 

then

Set as above.

 

Go to UVimage/editer and there is your UVmap, you may have to edit the name as Blinder likes to add a .001 at the end, Trainz will see that as a missing texture.