nooby question

is ESF playable on CZ insted of HL and how i do it? pls answer me

What's CZ?
Anyways ESF a HL modification, it needs HL in order to play, so I supose you cannot.

in short - cz = condition zero.
If you just have that, you cannot play ESF i'm afraid - CZ only lets you play condition zero and the original counter-strike.
You need either a standard halflife or counter-strike key, a day of defeat one or a halflife generations key.