This is the code I mentioned. You NEED this to get it to work. So, go ahead and download it.
left 4 dead splitscreen config source code
No files were found matching the criteria specified. We suggest you try the file list with no filter applied, to browse all available. Add file and help us achieve our mission of showcasing the best content from all developers. Join now to share your own content, we welcome creators and consumers alike and look forward to your comments.