http://nekoarcnetwork.com/l4donl4d2/This is all currently going on our server. I created a .zip file with all 5 .vpks for you to download, from my webspace(uploading it now). So who knows how long it will take. You will just need to click the .vpks for them to install themselves to your addon folder. Easy. However, you may also need to copy and paste the map files into the map folder. Not sure on that. It will involve going into the L4D2 install folder, finding the folder called maps, and pasting the files into that folder. Now everyone take a deep breath. I will supply another .zip file with those in them if that's the case. Click it, copy, paste. Deep breaths.
This works. I started a lobby, had Darth join, started the game(it hosted itself locally), and everything worked for me. Textures all good.
If you are feeling frisky download the damn files from the website link and install it all now. If not, wait till my shit is done uploading and I'll give you the link for the simpler(I hope) way of getting everyone on board.