From the readme:
New and Improved Crates and Barrels by Watevaman!
Models/Original Textures: Valve
Various Textures Used: www.cgtextures.com
I felt that the default crates and barrels looked like crap, and being the weird dude I am,
I decided a reskin would fit my needs!
Oh, and various places.
Simple, I've included two main folders that you need, the High Res folder and the Low Res
folder. Open whichever you choose (but only one!) depending on your system and what
you want. Then, take the materials folder and extract it to:
C:\Program Files\Valve\Steam\SteamApps***YOURSTEAM***\day of defeat source\dod
Now, as a precaution for those that don't want phong (specular highlights) on the fueldrum or normal mapping on the fueldrum and barrels, I've included options to have those off. Simply open the folder you want (No Phong... or No Phong or Normal Maps) and extract the materials folder to the same place as above.