well, just for that very reason that the WON networks are down, hmm ?
Anyway, install metamod first. Let's say you wish to install the bot for Opposing Force. The mod's folder is "gearbox". So in C:\Program Files\Steam\SteamApps\your@email.com\opposing force\gearbox you create a folder called "addons". Then in this folder you create another subfolder called "metamod". And inside this one you create yet another subfolder called "dlls". And you put the metamod.dll in it.
Now in the Steam games list, right-click on the Opposing Force icon and select properties. Then in the game properties window click on the "Launch Options" button and enter exactly this text :
-dll addons/metamod/dlls/metamod.dll
Now metamod is installed. If you run a game and fire up the console, you can type "meta list" and metamod will report that no plugins are running yet (which is normal since the bot is not installed yet).
Now you extract the bot archive to C:\Program Files\Steam\SteamApps\your@email.com\opposing force
Then in the newly created "HPB_bot" directory browse to the "gearbox" subfolder and run the install.bat script. That's all. The script will create an entry in metamod's plugins.ini file for the bot (or create the plugins.ini file if it doesn't exist yet).
You should then be able to see the bot plugin running when you type "meta list" in the console. It means that the bot is installed.