I found these cheats for Prehistorik 1:

Simply press down [1] [2] [3] [4] in that order to give yourself loads more time and make the game a fair bit easier into the bargain

Unfortunately, they don't work. Does anyone know how to enable cheats in this version of the game with GOG - DosBOX?
Any cheats would be helpful.
Please help.

From what I read, those cheat codes work only if you launch the game through the ccode.com

I was trying to check out that possibility, but so far out of luck.

The file dosboxPrehistorik1_single.conf, which is used for dosbox shortcut, launches the titus.bat file. But when I read it, it turns out that it launches only file preh.sqz from preh folder.

And at this point I have no idea how to launch the game through this file. I was trying to modify the conf file, by targeting the ccodes.com instead of titus.bat, but then game doesn't launch at all.