I don't think any of you actually read any of the suggestions given in this post. You would rather have personal support, and that isn't going to happen.
If you're trying to play ESF on STEAM and are getting the dll error, you need to go to your OLD Half-Life or retail CS folder and find the fmod.dll file. Copy just that file. Go to your NEW Half-Life folder (C: \...\Steam\SteamApps\
[email protected]\half-life) and PASTE the fmod.dll into it.
If you are running ESF on WON, go download the fmod.dll from the link above, and place it into your C: \SIERRA\Half-Life or C: \SIERRA\Counter-Strike folder.
If the problem persists, try updating your HL version by either downloading the current HL patch for WON or using the Update system built into STEAM.