Extract both files to the following folder:

\...\Steam\steamapps\yourloginname\team fortress 2\tf\materials\models\weapons\c_items

Please remember this will not work on sv_pure servers. From my experience the default BONK! Atomic Punch textures have been used on servers with pure.

Mountain Dew Code Red and Mountain Dew Voltage (C) Pepsi Corperation
