Downloading Maps for xGPS is simple, but might take a second to understand how to do so using the Manager. Basically, you make a region, which is what you want to download, by making a shape with the 'dots'. Overlapping the regions is a good idea, as you may lose some pieces of the map if you don't...
On the device, under settings, place xGPS into Wireless Transfer mode and connect to it from xGPS Manager, to perform the map transfer to iPhone..
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