There are better people to guide you through the steps necessary than me but this is what worked for me. Don't use the TomTom installer from CD. Extract the cab files from the CD, I use Winrar on my PC to do this. Copy the cabs over to the vario. Using a file explorer on the vario create the following directories. \tomtom, \My Documents\TomTom, \Storage Card\TomTom, and finally \Storage Card\zip. Copy your map to \Storage Card\Great-Britain-Map\. Copy Great_Brittain.Postal to \Storage Card\zip. Tap on the cab files one at a time. I don't think it matters which order you do the cabs. I soft reset between cabs but again I don't think this is essential. Once all the cabs have installed, DON'T start TomTom. Go to setting>connections>Bluetooth>Devices and setup a new partnership with your GPS unit. Tab to COM Ports and create a new port for the GPS. Leave Secure Connection unchecked. Mine is COM6. Using a file explorer, I use TotalCommander go to \My Documents\TomTom and edit CurrentMap.dat to point to your map folder on the storage card. Soft reset and when the vario is backup start TomTom from the startmenu. When asked to configure GPS choose Other Bluetooth and then COM6. I found it helped to be outside with a good satelite lock prior to this last step. TomTom will automatically turn on Blurtooth for you and switch it off again when TomTom is closed. TomTom does take an age to come up after tapping the startmenu but once running it is pretty responsive. If you overclock with OmapClock TomTom does come up quicker but it is still the slowest program on my vario to launch. If you need further help just shout. I will try to find the exact list of extracted cabs I used. I do know that the English Female voice is voice05.cab.