[a_lazy_dude]

the bummer with tomtom is that all of its folders (and there's like 10 of them or some crazy thing) need to be on the root of your SD card, including the maps folder and some random loose files. I'm not sure if the precise folder name makes a difference or not, but mine is named "USA_and_Canada"

as far as only loading up specific areas, those maps are all sold seperately on TomTom's website, and seem to be broken down by region, not by state (i.e. midwest, midatlantic & new england, etc). as far as i know there's no way to extract certain regions from the all inclusive USA_and_Canada map.