My map ID is 1709. I got bought map from Satguide. My India map is working. (I don't have any maps inside the device, it is just the normal files and some updates). IN my SD card I have [Garmin and Map(created by me) folders] and a syncguide.dat file. I have unlocked all the xplorer maps (Chennai, Hyderabad, Calcutta, Banglore and New Delhi) using the "unlock script.bat" and put it in the map folder. And in my garmin folder I only have gmapsupp.img and.unl file, and a POI folder with poi.poi in it.

Actually when I unlocked using JM kg and put the chennai file inside the map folder, while starting the device it said can't unlock maps. After I unlocked with bat file, EPM wasn'tavailable, but I could see some updates in POI Food( they had more options like asian, chinese etc).
From what you have posted, I think i need that .gma and .unl file for SD card. How to find the SD card ID?
Thanks