Odd! The small split works best of all with my AU map. I find it pretty useless, but only because it's got bu*ger-all views. The Western nuvi xx/SP app JCV file construction is in fact not very dissimilar to the Asian JCV file's construction which is why it's generally more 'compatible' than the other Western style split and fullscreen when used with Asian firmwares. Expert explanation here by syzygy: [Only registered and activated users can see links. ]
Images from my 765 SG using the small splitscreen file:
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As you can see from the 2nd image the preview is cr@ppy though, but at least the nav screen displays nicely.
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