Manually installing Vocalizer TTS voices - XL330S

[EricDP]

My TomTom HOME seems to be unable to install any computer voices - it ends with an error every time. However, I seem to be able to manually copy the files onto the device. But when I do that, it doesn't seem to see the voices. Can somebody please provide instruction for how to install/activate computer voices manually? It's an XL330S.

Thanks!