I mean :the map in internal memory named gmapprom.img in .System and its .JCV in :System/JCV folder with its original name (SGMYMAL.JCV ?)
The second map in sd/Map ,named as you like eg.Malaysia.img (not gmapprom.img) and its JCV in: sd/JCV/Malaysia.jcv
Sorry, I wrote something wrong above .JCV goes in JCV folder in sd, i correct it now