: Place your custom models, textures, or maps in their respective sub-folders (e.g., maps , materials , models ).
If your goal is to "create content" such as mods or custom campaigns within this build, you need to use the L4D2 Authoring Tools .
: Once extracted, you should see a folder containing the game executable ( left4dead2.exe ) and the left4dead2 data directory. Adding Custom Content (Mods/Maps)
Before running this specific build, ensure your PC meets the Left 4 Dead 2 System Requirements : : At least 13 GB of available space. OS : Windows® 7 32/64-bit / Vista 32/64 / XP. Memory : 2 GB RAM.
Storage: 13 GB available space. Sound Card: DirectX 9.0c compatible sound card.
There are six basic steps to creating your own custom campaign Add-ons for Left 4 Dead 2: * Make an Add-on folder and content sub- Valve Developer Community Left 4 Dead 2 on Steam