Install it in your cstrike folder, it should overwrite your libist.gam and create an addons folder and a yapb folder in the addons, also metamod should come with it (I think).
Open Metamod folder open plugins.ini make sure yapb is:
win32 addons/yapb/dlls/yapb.dll
//linux addaons/yapb/dlls/yapb.so (I think)
If you are running a windows server your settings should be like this, if not using windows visversa this.
The libist.gam should change the dll to addons/metamod/dlls/metamod.dll and everything should work fine when running counter-strike.
If you don't have metamod, you can dl it here
http://sourceforge.net/project/showf...ease_id=410534
Extract it to cstrike/addons/metamod/dlls/
Then create a plugins.ini in metamod folder.
This bot is ment for 1.6 and czero. (That's what I know of).
Also you can read the readme.txt in the yapb package