I've created software for creating your own voice for iGO navigation software, it's totally free and accessable via browser (java JRE required): http://en.geraspatarimas.lt
If you are interested, please check it out. Comments and criticism are welcome
quote: * run the program; * record phrases; * save created voice in zip format into your hard disk; * copy saved zip file to navigation; * and finally you can enjoy your own custom voice :)