I like your sense of humour. But may I counter the lack of Irish: TomTom offered/offers it, and they even have the likes of Flemish ("Belgian Dutch"). But understandable that Garmin wouldn't cover all avenues. And regarding Karen, I honestly had no clue about her and being the most famous GPS voice, additionally surprising that it is Australian! I'll definitely have a listen to her.

Thanks for sharing the ZIP with the voices. Unfortunately... same story. None of the files actually appear in the voice list on the Nuvi. So there's definitely something strange going on. What do you reckon is the issue (I see you mentioned 'modified region 16')?