First I would like to apologize for some of the confusion (I'm new to the workshop).

The following guide is to show how to unpack this pack properly and getting the vpk file/s to your addon folder for use.

Step 1:
Subscribe to his mod, wait for the download to complete, than launch the game. When you get the confirmation that the Weapons Script Pack has been loaded (and check your addons in your option menu). Then you can exit the game.

Step 2:
To unpack this you need " VPK.exe ", Open steam go to " Library " change the listing from " Games " to " Tools " scroll down until you find " Left 4 Dead 2 Authoring Tools ", download it.

Step 3:
Now go to the folder that contains the VPK application (VPK.exe).
C:\Program Files\Steam\steamapps\common\left 4 dead 2\bin
Scroll down until you find a application called VPK. You may want to make a short cut to your desktop for easy access.

Step 4:
Go to your Workshop folder in your addons folder.
C:\Program Files\steam\SteamApps\common\left 4 dead 2\left4dead2\addons\workshop
You will find vpk file labeled a bunch of numbers, 154033802 (This how it is for me, but you will get the mod thumbnail picture named the same thing, so finding it would not be to hard.)

Step 5:
Click and drag (grab) the vpk file mentioned above (154033802) and drop it over the VPK.exe located in
C:\Program Files\Steam\steamapps\common\left 4 dead 2\bin
or the shortcut. It will then create a folder named the same thing (154033802) in the same folder as your vpk file (which in most cases is your workshop folder.).

Step 6:
Open the folder that was just created. You'll see some text files for more information and some more folders containing all the vpk files that are the actual mods / scripts. You can now grab the vpk files you want and drop them in your addons folder.
C:\Program Files\steam\SteamApps\common\left 4 dead 2\left4dead2\addons\
Launch L4D2 and enjoy.

Hope this helps and again sorry. - LoadedAK47