i am a newby, have a chinese garmin nuvi 1455 (2010) with SW 2.10. Through the forum I succesfully updated my map to China NT City navigator (english) 2010.30, but i am lost how to update my SW, especially since there seem to be so many update versions between 2.10 and the latest 5.30.

Can somebody help me doing so? And will I be able to instal JCV after that?