DragonsIOA was a very popular trainer when it was first released. It has largely been surpassed by Codex and The Beast now, but it still has several unique features.

Version 6.0 was never finished but it is the only RCT trainer to feature in-game menus and the only LL trainer that can remove height restrictions for rides on Windows XP. The beta version has a bug meaning that the ‘Ride options’ dialogue cannot be opened if there is a ride with a name longer than 8 characters1). So to remove height restrictions apply the hack on an empty map and then load your park, the height restrictions will be removed until you restart the game.