Use version 7 of the maps, dont change the folder name, make sure the maps are activated, and the root of the SD card is the first layer of folders. Like if you open the SD card in explorer, youll see a TomTom folder. The North America folder should be on the same level.
Ok let me see if I understand. The Folder NorthAmerica should be outside of TomTom (That's what I understand on the same level) So...
iGo8
Testmode
TomTom
North_America
usericon, USB Disk
voices
Is this correct?