ludo;3265973 said:change diffuse texture is very complicated, but You can import the same texture (dds) in an another part...
Concerning the problems of shadows I would have to look at your container file
There are some diffuse textures used only by one part, which is a waste, and there are some diffuse textures used by lots, and they are not needed. So I relink via hex-editing some parts that use the second diffuse texture to the first one.
I sent you the container via PM.