To install, extract contents of .zip archive into the cfg folder within your left4dead2 installation directory.
ExecutionCode:steam/steamapps/common/Left 4 Dead 2/left4dead2/cfg/
Type the following into the game console once you launch your game in order to execute the configuration script
You can also get the same effect by executing the following directly into your game console without the need to download this packageCode:exec em_client_tick
Code:rate 60000; cl_updaterate 60; cl_cmdrate 60; cl_interp 0; cl_interp_ratio 1