not quite sure how you can make a trainer without actually playing the game, but I'm pretty sure it's a prerequisite.
i personally use CH trainers all the time and never have any trouble, including the sacred 2 one. of course, you and anyone else is welcome to enlighten us with your leet trainer making skills and do one yourself.
I am working on the Infinite health option right now. As of right now that is the thing that may cause a game crash. Everything else seems to be working without any issues. You live and you learn. Hopefully I'll have the Infinite Health working 100% soon.
GCW has another trainer that is +2 for health and diamonds. It works well but for the fact that with infinite health makes the screen jump like I'm on fire. It only just satrted doing this for me and worked for over an hour great.