Umh....;)
Europe 2013.20 you can use, but you must give up the function JV ;)
All new series using the JV split screen, and the 2013.20 there are (to my knowledge)
On nuvi x0 not work JV Full screen!
For series x0 just JCV Portrait Template (test on your file GarminDevice.xml) (I think) ...D3589040A.JCV is Portrait Template (and split screen) ;)...but for NT(U) 2013,21
Bye,bye