I just noticed that changing among the various flavours of English (American, British, Australian) not only changes the inflection/tone/accent, but it also changes the pronunciation itself.

For example, the American English voice correctly pronounces "Davis Street" with a long "a", like "baby". But the British English voice pronounces the same name with a short "a", like "rabbit".

Does anyone know if it's possible to re-arrange or modify the voice files on the Nuvi to get the American pronunciation, but the British accent?