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well, I just bought a globalsat 359 on ebay... I think, as long as you have bluetooth, which you do on the 4700, i have one, the 4700 should get the GPS information. Then you need a software program/ and maps to go with the receiver, then you have to make sure you have enough memory available in the 4705 to store the maps. I have a 2G SD card with about 1.2 G available, and a 2G CF card which i can empty if I need to.
You best bet is to read to GPS software thread in the GPS part of this forum and to go to gpspassion.com and search for appropriate threads on GPS software.
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