Nova Gas Smoker

Installation
Decided to call him Nova Gas Smoker, gratitude to MentleGen for the name.
VPK version available now, put VPK into left4dead2/addons folder and away you go! I have had trouble in the past with particles and VPK's, so it may or may not work for all of you, but the manual method of editing the PAK file will definitely work.

Place the smokerxx.pcf file into your left4dead2/left4dead2/particles folder.
Then go to your left4dead2/left4dead2dlc3 folder, and open pak01006 with Notepad++, find the line
"file" "particles/smokerfx.pcf" and change it to
"file" "particles/smoker_xx.pcf" save the file, and exit, then you're done!
He has a slight glow to his particles now too, as shown from screenshots, so shooting this bugger in the dark is much more interesting now.
Works with any skin.