This isn't the pushing train carts part, but it makes the train follow a train track type mesh and align to the ground too. I've tried to comment the best i can :o)
http://www.rosscrooks.pwp.blueyonder.co.uk/traintrackfollow.zip
The train unfortunetly rotates 90 degs on it's side though, due to the linepick coming form the left, and not the top. I suppose all you would need to do, is adjust the normal the pick returns, or rotate the train mesh 90 degrees :o)
http://www.rosscrooks.pwp.blueyonder.co.uk/traintrackfollow.zip
The train unfortunetly rotates 90 degs on it's side though, due to the linepick coming form the left, and not the top. I suppose all you would need to do, is adjust the normal the pick returns, or rotate the train mesh 90 degrees :o)