Gidday RogerH, there is a bloke I work with in Brisbane whos knowledge of Railway modelling is huge.
Im sure if you check out his YouTube channel and leave him a message, he should be able to give you some pointers.
His channel is called FishplateFilms. If you click on the link below it should take you to his channel. His name is Gregg.
Good Luck.
http://www.youtube.com/user/FishplateFilms