This tool is an effort to automate addons installation for Alien Swarm. There's a list of available maps on your left for you to install. A brief description and some general infos are given when you select them from the list.
Get it here:
http://sites.google.com/site/kattle1987/VPKTool0.9.zip
Right now the maps are added by hand by me. I usually add one or 2 maps every evening, and check for updates for the existing ones. Of course I might be missing something nice: just send me a PM if you want a map added to my list or updated!
For the future I'm planning support for more features like multiple screenshots and automatic updates straight from the Swarm Armory website, when premixedpie will have completed some work he's doing on the map database.
This program is created using the Autohotkey Scripting language and released under the terms of the GNU General Public License 2.1. Source code is included in the zip file. If you want to contribute you are welcome, just send me a PM.
My tool uses the external programs cURL and 7zip, both released under Open Source licenses. See the "tool\" subfolder for license files.
Please, consider I am spending a lot of time to program this, and I do this since I think that Alien Swarm is a BEAUTIFUL, free game, and we have to do something as a community to keep it alive.
Give a try to my tool. If you like it, please leave reps or comments: is the only way I have right now to know how many people like my work, and this really keeps me motivated.
Readme file is included for further informations.