Alright. Call me daft. In the html folder I've got the updated index.html file.

I've also got a directory: english_us
Inside english_us I've got english_us_male
Inside english_us_male I've got the config.xml and all the .wav files.

Is this the correct directory structure? I've got functional nav but no voices.

\html\index.html
\html\english_us\english_us_male\*.wav
\html\english_us\english_us_male\config.xml