So what problem are you actually having?
From memory, I had Australia and Poland installed and working correctly when I downloaded Eastern Europe and it just did not want to play the ball.
I downloaded it... because I could, and because it was a slightly later version than Poland - which is where I was at the time.
I think what I did was that I first deleted the map and then de-compressed the archive on my PC (rather than use native the HTC capability) and then I transferred files into the previously made folder on the HTC
It did not work the first time, so I uninstalled Tomtom and reinstalled it again and all 3 maps worked.
Hope that this is of some value to you.
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