Firstly, welcome to the forums.
Secondly, please do not double post in the future. If you are unfamiliar with the rules, please read over the
Acceptable Usage Policy.
Thirdly, the meleesounds.sc is simply a blank text file. And there is an easy way to fix it. Go to your ESF directory in Steam/SteamApps/Your E-Mail/Half-Life/ESF/ find your events folder, if you don't have one create it. And in that folder, create a new blank textfile called meleesounds and be sure to save it as <u>.sc</u>.