Download this map NAV3 has Metacodes it will work 100%. [Please Register or Login to download file] Otherwise you can download this file, there are 6 Navcores, just try it, but you need to change the map, there is UK. So just delete the map and copy a new one.Here you have a keygen where Metacodes 11.55 are embedded, but you need to turn off the antivirus and run the exe as a sleeper.
[Please Register or Login to download file] Here are all the Navcore [Please Register or Login to download file]
And here is the link to TTactivator will do everything for you. [Please Register or Login to download file]

Thank you for your quick reply, I will try them and see if they work. I forgot to mention that I have an old TomTon 8.041 with only 1Gb of memory