Tutorial: Create and put in a .VPK addon in L4D2

In this tutorial Hilmar shows you how you can create your very own addon for L4D2, however he only covers the basics and shows you how to put in custom sound clips and music (let's you skip the "rebuildaudiocache" command).
NOTE: You will need the Addon-Support tool. To get it, just open Steam, then go to Library, then Tools and find Left 4 Dead 2 addon-Support. It's free and with it you can also play L4D1 custom maps.

Copy-paste the below text into a .txt file called "addoninfo" (without the quotes)

// The addoninfo.txt file is a metadata file that is required by all Left 4 Dead Add-ons.


"AddonInfo"
{
addonSteamAppID550
addontitle"Name of mod" // Add-on title that shows up in Add-ons list. ~20 chars max
addonversion 1.0 // Add-on version.
addontagline"Mod description" // Add-on tagline or wrap-up- a short description. ~100 chars max
addonauthor "My Name/Alias" // Name/alias of the author

addonContent_Campaign0 //LEAVE THIS ALONE.

addonURL0 "www.examplehost.com/mymod.zip"//An html home page for the add-on that includes a download link.

// short description that appears in the Add-on list screen...
addonDescription "Short mod info"

// Authors can add localized descriptions here. (Not yet supported)
addonDescription_FR "Translated to another language, not yet supported."

}