I have a Navigo 6.0 SatNav and the mapping works OK but there are no voice directions available. The speakers seem OK as the key clicks and buzzes are audible but there is no voice. I am downloading Turbodog 7 from the Astrob site plus the mapping for the UK but I don't know how to install these into the satnav unit. Perhaps some kind and knowledgable soul could help me.