Well, I can't take all the credit; after all; I did get the basic model from the 3D Warehouse (Sketchup database) website. But I did do a big revision and modifications to get it to work in Metrosimulator. Quite literally; take it al apart into separate components (framework, doors, windows, bogies, wheels, couplers...), work over any one of them (one at the time), and then put it back together in the simulator
Who the actual author of the basic Sketchup model is, I do not know; the exact same model is on the website under three different uploader names (MindTheGap, fra-an and Andrey_math).