Hello all and thanks first of all for downloading the road pack.
If you like the pack the way it is then no need to add these alternative textures.
If you do wish to replace them for a more darker look, then follow these simple steps if you are not sure how to get these into the map.
So inside this zip file you will have 1 file folder – 1 i3d file – 1 shapes file.
Here is what they are for