Question about Roller Coaster Tycoon 1 (rides).?

Okay, so I am the type of person that can never be scared or over excited about a roller coaster, I always want bigger, faster, better... So I seem to make my coasters in the game like how I would like to ride them. But obviously, all the guests are too scared to go on, even if it's free!! For a long time now I've wanted to know if theres a cheat to make the guests not be wimps. Please help!! Thanks:)