[KWo]

I cannot write it better than it already is written. Instead crying, just write what You already did and what You couldn't understand. If that paragraph was to difficult to understand, You can try a bit easier way.
Download All-In-One package. The CS has to be stopped on Your server. Unzip all the crap into the main "cstrike" or "czero" folder (depanding on the mod You are playing). I mean for example:
"...\steam\steamApps\youremail@com\counter strike\cstrike"
Let overwrite all Your older files. That will install for You automatically metamod, AMX X and podbot mm.
With installing Fullpack the difference is - You have to install metamod first (manually), then You are unzipping the contains of fullpack into the "cstrike\addons" or "czero\addons" folder (read twice this post too see the difference).

Note - non-steam CS.6/CZERO versions aren't supported (only Steam based, eventually old CS1.5).


After installing everything start the server and write in the console:
meta list
It will tell You what and if correctly You have it installed.