Look dude that site has nothing to do with STEAM.
You cant play ESF using a hackjob. Not to mention its illegal to use that stuff.
The error you get is because you are not using a legit Half Life. And no, ESF will not work with counter strike.
You can get steam from
www.steampowered.com and you can buy half liufe 1 from STEAM or from a store.
But you will not get help with piracy from us nor will you have much luck using pirated software with 1.3