One is for the game The Witcher Nude patch, information and installation instructions written in English in her readme.txt
Here’s how it works.
If you want Triss, Shani, and Adda naked all the time then use the meshes (mdb) and the textures (dds. If you want them nude when it makes more sense, i.e. sex scenes, then use the textures only. In my experience, it is required to start a new game for them to be naked all the time.
More specific The Witcher nude patch:
Do not extract the mdb (mesh) files unless you want Triss, Shani and Adda to be nude all the time.
The files must be in the Program Files\The Witcher\Data\xxxx where xxxx is either _meshes00 for the mdb’s or _textures00 for the dds.
The path and folders are already in the zip file.