IIRC, the Windows installer has a method where you simply point to your mod directory and it installs the files in-place. Granted, this only fully works if you have local access to the server files.
When I was on Windows, I think I remember using that method to get the files and then uploading them to my server (I may have needed to edit liblist.gam manually though).
You're going to need to give more details about your situation.
How did you install your Counter-Strike server? Is it local (you installed it with SteamCMD) or is it a hosted server (from a game server provider)?
Where did you see this error message?
Also, the link provided above is an old site but most of the instructions are probably the same but if you do download things individually, I'd recommend getting the version of MetaMod that is available on the
AMX Mod X download page.
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