Help for md5 hash bypass checksum in lua 5.0.3

Hi,
I am working on hacking wildcraft game since I already fully reverse engineerined the game. Also game uses shiva 3d engine with lua 5.0.3 complied script. I already decompiled it.

But in scripts game values are md5 hashed as string like :-
5525c412180f7e3fee8f9963a00689dc.

I searched this string using utf-8 text gameguadrian, but when I edit results game crashes. I think game uses md5 checksum. Also if you need scripts I have all scripts of game with security function.

Thanks,