Just a little info when you update the firmware in the phone:

I have just updated my Nokia E66 yesterday to versio: 200.21.118 26-11-2008 RM-343.

When I did that, I allso took my new memory card in action(a 4 gb SDHC card).
I thought I just could copy all the Garmin folders to the new card and then just install Garmin MobileXT again. But I found out, that you have to make new Notepad documents with the SW.UNL and GMAPSSUPP.UNL codes.
When you install the program again, the program gets a new Unit-Id end therefor you have to run the Jetmouse Garmin Keygenerator again to make new keys to the software and the maps keys.

That was just a little info. Don't know if it is allready posted here in the thread. But I think many would like to know it, because there is new firmware updates out now.