I assume you're talking about the DragonIOA's trainer.
The height thing does work, but what it does is it removes the height restrictions from the smaller rides. For example, the wild mouse could be built as high as the steel twister. That's what it's meant to do. If you were hoping it would take away that maximum height for the game thing, sorry, it doesn't. From what I've heard, that's impossible.
And the maximum amount of people is around 4,500 I think, although you might get a few hundred more.
I've never heard of anyone getting more than 5,000.
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-Dave Rutherford
*If things seem under control, you're just not going fast enough*