Thank you so much.....it really works like charm! My Nuvi 4592LM now can detect CN Indonesia 2014.40 perfectly here.

Those 3D building maps i put together in .system folder are preloaded CN Singapore Malaysia NT 2011 3D (gmap3d) & Indonesia 3D map (gmap3d1) here. The display in myMaps as appeared are 3D landmark Indonesia & 3D Landmark Indonesia CN SGP/MAY NT, 2011 3D.

Once again thank you in advance for your cordial help & attention.