Well, I don't know how many people realize this or not, but this is designed to work with your Species mod and it works fantastic.
A little edit with the save game editor to swap out the sound set and voila. I started a game with one of the Holowan Twi'lek models and swapped out the regular female human voice for the uber sexy sounding twi'lek voice.
Works excellent when using other than human species.
Keep up the great work, Redrob41!!