I have a 500GB ipod (specially built with a larger drive) and since i bot my edge (3 months ago), the longest i have been in the car is about 45 minutes. If I leave the ignition on overnight and have the car hooked up to a charger and manage to get the whole ipod to index, will it hold and not index ach time i start the car after that unless i change the content on it> I am just wondering since I do not want to do this unless the whole indexing process holds. until it is completely indexed, i cannot select other playlists on the ipod through the MyTouch. Any insight is appreciated...