[Sailor Steve]

I used the 'GWX2' one, and just opened the folder, then put the contents of each folder in the same folder in the game:

So all the files in data/library go in the library folder in the game.
The file in data/MissionEditor/Locations goes in that same folder.
Same for data/Terrain/Locations.
Same for data/Textures/TNormal/tex.

Or you can just put the Schleuse_Holtenau_Mod folder into JSGME and let it do its thing.

But whichever method you use, don't forget to put the Locations.cfg file from the version you're using into the Data/Terrain folder!