The easiest way to get these files to the right place is to use the Nexus Mod Manager, but if you still want to use the manual install method, you should just merge (drag and drop or cut and paste) the data folder I have provided with your data folder in your game directory. 

For me it is as follows: 

C:\Program Files (x86)\Steam\steamapps\common\skyrim\data

Final resting place for the three files are: 

C:\Program Files (x86)\Steam\steamapps\common\skyrim\data\textures\clutter

This is where they go on my setup - I'm not sure what the different install directories are for other machines - so do a bit of sniffing around on Google, and you should find the info pretty quick. 

Good Luck!!


GM