After using your post to setup and configure all the voices I really appreciate the effort it must have taken to compile it all.
After using festival for a while I created a shell script (bash) to automatically convert doc, txt, rtf, pdf, ps, chm, html, and even direct URLs into almost any type of audio file (wav/ogg/mp3/etc) using festival with the voice you chose.
The script is GPL and I posted it along with instructions at my site: http://taggedzi.com/text2audio.php
Hopefully this is the right place to post this, as it ties in and I am not sure if it should be a post of it's own.
Well enjoy and happy text to speeching!