To add it to Team Fortress 2, follow these steps.
1. Navigate to the "C:\Program Files (x86)\Steam\steamapps\common\Team Fortress 2\tf\" folder. (For Windows, I don't own a Mac)
2. Create a new folder named "custom" (If you already added a folder named "custom", then skip this step.)
3. Finally, place the components inside the "smash_sound_replacement_tf2.zip" file into the "custom" folder.
And there you have it! Enjoy!