Mine just won't launch. I think I'm missing something.
Be sure to closely follow the instructions. For instance, you should make sure all the exe files do not have "run as administrator" ticked in their properties. Other than that, you should simply be able to drop the files into the root Creatures 2 directory (backing up your original ddraw.dll first, of course!) and use launcher.exe to boot up (not GoG's start.exe or creatures2.exe itself)
Hope that helps.