Okay, first of all, there aren't any trainers or hex editors for The Longest Journey, because April has no stats, skills, hit points, or anything else you could
conceivably want to edit. I'm really surprised how many people ask me for that.
The only way to really cheat in this game is to look up the
solution to a puzzle rather than figuring it out yourself. If you want to do that, or you just want to learn more about this great game, here are a few good
links for you:
Universal Hints System is a good place to get a spoiler for one specific puzzle you're stuck on without inadvertantly ruining any of the
rest of the game--they have their walkthrough uniquely structured to reveal only one hint at a time.