Thanks Paul. A great screenshot!
I can't take all the credit, I had some useful help from G.M. and I've learnt a lot through his help. G.M. provided the animated door meshes and other helpful creation techniques. Thank you to G.M.
Thank you to Paul (paulper) for helping with the testing.
Edit: Must mention the original meshes were made by Platform3D who kindly made them available for conversion to Trainz. Platform3D seems to have disappeared from Trainz, I've no idea where, I hope all is OK... thank you wherever you are!
Rob.