The attached file. Run the exe and it will extract the sounds from Brood War into the "Starcraft/Sounds/" folder.
*Gotten from Blizzard
Also you can add Starcraft sounds to maps directly from the MPQ (won't take up any map space, making dl faster) using StarForge and other programs.
Also with this utility, you can change one of the sounds and when you play starcraft that is what it will sound like. (That might be explained in the help file it comes with)