perhaps you mean something different, but I don't think you need a trainer for what you're talking about. Any custom build ride like a roller coaster or log flume can have as many stations as u want. All you do is start building it, when you get to where you want the second station, go up to "special", and select "station platform". then just continue on from there back to the first station.
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www.angelfire.com/in3/rct