I have a couple sets of RCT tips related to Cedar Point on my website (below). They aren't specific to any particular scenario, but there are no trainers required, and they will work in any part of the game (original, Corkscrew Follies, or Loopy Landscapes). If you let me know the name of the scenario, I'll see if I can help you out more!
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Po!nt of View: A different look at Roller Coasters.
http://www.crosswinds.net/~justmayntz/thrills/