In this case unfortunately half of the model have a corrupted uvmap, so 3dsmax and other 3d app can view the textures correctly.
The black areas are the mesh without a uvmap:
So u need to remaps them.
About the meshes: They are fixable in some ways. One of them could be to esport them in another format and then reimport into max without the normals applyng the smooth group.
EDIT: If u want flip the normals of only some parts of the mesh directly into max, u can select the mesh by elements, then..right click and select Flip Normals Mode. So u can fix them manually.
The black areas are the mesh without a uvmap:
So u need to remaps them.
About the meshes: They are fixable in some ways. One of them could be to esport them in another format and then reimport into max without the normals applyng the smooth group.
EDIT: If u want flip the normals of only some parts of the mesh directly into max, u can select the mesh by elements, then..right click and select Flip Normals Mode. So u can fix them manually.