Just got my Optimus V two days ago but havn't bought the data/sms/voice plan so I don't have access to a data network yet. Cash is kinda super tight right now, I had just enought to get the phone. Can someone please help me figure out how to get GPS turn-by-turn navigation but with offline maps stored on the SD card? I've googled around and found people talking about RMaps, Andnav, Bigplanet, Mapdroyd, and some others. I've tried downloading all of those programs but I cant figure them out. I live around Nashville, TN if that helps. Thanks.