Not to sound stupid

but what would I have to do differently to get the Grey Wolves 3.0 mod to work?
I see that I have to download about 9 different files and then an exe file. Will it automatically find the steam download or do I have to manually tell it where to look? If I have to manually do it... how do I do it?
Final question in this post: Is the Grey Wolves 3.0 mod worth it? I never installed a mod when I originally played SH3 so I'm sure I'm behind the times compared to most of the posters on this forum.