You can give the next procedure a try.
*) Recommended Navcore 9.541 device
[Please Register or Login to download file] --
1) Make a backup of your Device and delete the content.
--
2) Unpack the* navcore (winrar ) and place folders and files on your Device.
--
3) Reset The Device (minimal 15 sec) and start it till the announcement "No map found"
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4) Copie the chosen map to your Device in his own folder.
If you open the map you see the individual files and probably a folder (brand).
Not a map in a map.
(plain map no speedcams,poi,etc)
How to read the chart.
http://www.navitotal.com/viewtopic.php?f=80&t=19485 --
5) Copy "FastActivate.exe" to your device
http://www.navitotal.com/viewtopic.php?f=127&t=19452 Run "FastActivate.exe".
Select 1
Select 2
Done.
6) Give a 15 sec reset and start the device if everything works fine
just then you can ad speedcams etc to the map
We like to hear the result Good or Bad.
And keep away from TomTom Home.