hi mate the voices in tomtom 6 are located in the voices folder on the sd card or your device depending on how you installed it. I am presuming that 6.2 is the same setup as 6 so if that is the case you can just check the voices folder also if it has file in the voices folder called collected.ini you need to rename or delte this to allow tomtom to rescan the folder for any new voices in the folder. if the voices are not in the folder on your device but they are showing in on the sd card you can either copy them from your card to the device or delete the folder from your device so tomtom will scan your sd card for voices worst case tomtom 5 voices can be used on tomtom 6 so you can copy them from your old install in to the new one
