After you downloaded this Half-Life maps.zip open it.Open the maps folder.If you want the Opposing Force maps for Half-Life, open your Half-Life folder(Example:C:\Program Files(x86)\Valve\Half-Life\).Copy the folder of the game maps you want and paste to Half-Life folder.Start or restart Half-Life and these maps will apper in the Create a server fuction.
Dear Downloaders
