Help me out plz!!!!!!!!!!!

can u download esf in CS, CS:CZ or CS SOURCE instead of hl? I alrdy tried to dload it in CZ. When i start the ESF it goes in CZ and my console pops out. What i do next to play ESF?

If you have the retail version of Counter-Strike, you'll be able to play ESF. Condition Zero won't work for modifications, and Counter-Strike: Source runs on a different engine entirely, the Source engine.