You have to download each of these files and then extract them into the starcraft directory. i.e. C:\Program Files\Starcraft\maps. Full instruction on this is in the readme file available at the bottom.
Sound Part One
Sound Part Two
Sound Part Three
Zerg Part One
Zerg Part Two
Zerg Part Three
Terran Part One
Terran Part Two
Terran Part Three
Protoss Part One
Protoss Part Two
Protoss Part Three
Protoss Part Four
The most important....the README file!!!