Sorry guys, I've been MIA for a long time. I found this thread again while looking for answers for the newer garmin devices (1200, 1300, etc.). Apparently they won't take the old .vpm format... they only take tts vpms. Unfortunately I don't know how to fix that, but I'm sure someone will look into it.

As for audio formats, yup, it's a real pain in the butt... I had to test the files over and over, and trying different formats. Sometimes they worked, sometimes not.
Damian, maybe you can get Arnie to record his voice for us with all the gps commands, huh? It took a lot of time (A LOT!) to get that done and working... I was just having fun, and I did it for free. I still think it's pretty funny. But it's obvious that the tone would never be the same for all files, since the recordings were taken from his dialogues in movies and speeches.