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http://www.l4dmods.com/index.php?option=com_content&view=article&id=282:play-as-infected-with-the-left-4-dead-2-demo&catid=2:news&Itemid=13<br />Follow this link how to play vs mode in l4d2<br />http://www.l4dmods.com/index.php?option=com_joomloads&view=package&Itemid=&packageId=908<br />Extract the ZIP to teamteamappsommoneft 4 dead 2 demoeft4dead2<br />Start up Left 4 Dead 2 Demo<br />Get a game going in Single Player or Online.<br />Type the following into console:plugin_cvar sb_all_bot_team 1plugin_allow_remote_commands 1<br />To become Infected, type the following into console:set_infected 1<br />To change back to survivor, type the following:set_infected 0<br />You can force a client in your server to be infected/survivor by using:plugin_set_infected <their userid> <0 = make survivor, 1 = make infected><br />Don't want your clients to be able to make themselves infected and manually spawn? Then use the following command:plugin_allow_remote_commands 0<br />If you want your clients to spawn themselves by using infected_spawn, and to disable auto-respawning, use this command:plugin_infected_autorespawn 0<br />