Thanks everybody for the help finally i did it for mena 2013 map as follows
The map in sd:/map/gmapprom.img
The jcv and the G2S files
sd:/Garmin/ D4385000A.JCV
sd:/Garmin/ D3059080A.G2S
it worked perfectly and I can see the junction view during my trip to Dubai last week
the next step I will do is to download the garmin CN Europe NT map which has more file types and I will then need your help again.
Thanks everyone for the help