Thalassicus
Bytes and Nibblers
If you like having music in all the eras, I found these Mp3's on download.com. With the simple XML changes attached you can add some quiet Native American flute music in the Ancient era (which previously had none). I found the lack of music there disconcerting; this also transitions well to the Classical era, where several of the tracks use flutes and percussion.
The MP3 files can be downloaded here:
Channel Through (4mb)
Brook (.8mb)
Turquoise Rain (9mb)
(Main page: music.download.com/jimgordon/3600-8829_32-100662975.html)
Place the music under "CustomAssets\sounds\soundtrack\ancient" (create a new folder), and add the XML files to these locations:
CustomAssets\xml\audio
- Audio2DScripts.xml
- AudioDefines.xml
CustomAssets\xml\gameinfo
- CIV4EraInfos.xml

The MP3 files can be downloaded here:
Channel Through (4mb)
Brook (.8mb)
Turquoise Rain (9mb)
(Main page: music.download.com/jimgordon/3600-8829_32-100662975.html)
Place the music under "CustomAssets\sounds\soundtrack\ancient" (create a new folder), and add the XML files to these locations:
CustomAssets\xml\audio
- Audio2DScripts.xml
- AudioDefines.xml
CustomAssets\xml\gameinfo
- CIV4EraInfos.xml