Well it is like a patch you cant really install it you have to have your own server and you can set it up to be a zombie mod best is to search for Zombie mod servers all of their maps start with zm_... name of map. So thats how you know its a zombie mod server but if you dont have a server that you run your self you cant set it up. And no you cant do it with bots.
yes
Click the "CS:S Zombie Mod" link below. Then select one of the zombie mods. Follow the instructions on the first post or on the downloaded readme to install it. Note: You must first install SourceMod on your server.
First install AMX Mod X: www.amxmodx.org Then find the Zombie Mod plugin you want, and install it.
Yes, there are a couple of Zombie Mod plugins for AMX Mod X. The most popular ones are Biohazard and Zombie Plague. They can all be played online, because Counter-Strike is an online game.
You must install AMX Mod X on your listen server. Check the related links.
It is a mod u can install, but i don't know where to install it
depending on the mod you want For like players or a map you can download it at fpsbanana.com and you can get if from them. If you want like zombie mod for custom match you cant play that with bots you have to have your own online server and have to modify it your self.
Any website as long as it's free of viruses
Most mod servers have the admin mod and the game mod (zombie, super hero, etc)
One of the most popular Counter-Strike 1.6 Zombie Mod servers is the ZoD Zombie Plague server. It can be accessed at the IP of 63.251.20.47 on port 27015.
Join a counter strike server with zombie plague mod installed. I recommend the gamerone.net Official Zombie Plague Mod You can get all details including the server IP address, staff and even VIP information at the community website: http://gamerone.net Enjoy!
You can install a zombie mod in the game.Download the mod from internet,then install with the given instructions.
You can go multi player and look up zombie mod servers all of them have the zm_(mapname) maps so you can search by zombie in server name or zm_ in server map. Unless you have your own server that you run you cannot play zombie mod with bots.