Thanks to the now defunct Ensemble Studios for
Age of Mythology and the "terrain" sounds.
HOW TO INSTALL!
Move the sounds from the Sound folder to the Age of Mythology Dictionary (i.e /microsoft games/Age of Mythology) or wherever the heck you put it.
UNINSTALLATION
How do I uninstall it?
Remove the Soundset-xpack.xml and soundset-xpack.xmb file, along with the ambientsounds.xml and xmb files