Nice to see your GPS device, similarly I have bought Double Din system from China with built in GPS. I have gone through a lot of trouble trying to find the right Maps for my device. First of all IGO would not work with this system since Maps available for this region are not compatible with IGO. This device has a slot where you can insert a SD card.
1) First download Garmin Mobile XT
2) Download Google Maps for Pakistan
3) Integrate the Garmin Mobile XT with Pakistani Map
4) Insert it inside your SD card and load put it inside you device.
5) You are ready to go
You must be wondering why I can’t use any other software other then garmin
1) For Pakistan PKmaps, google maps and NAQsha maps are available which are only compatible with garmin
2) This device uses Windows C.E processor
3) Garmin Mobile XT is only compatible with Windows C.E processor.
4) That is why you will have to download Garmin Mobile XT
You must be having questions about these Maps
1) PKmaps are developed by individuals residing within their city
2) Google maps offcourse are developed by google with very good details
3) You will have to pay for naqsha maps so if you can afford this then go ahead.
I would recommend google maps for Pakistan and let me make life easier for you.
Let me provide you with a link so that you may directly download Garmin Mobile XT with google maps for Pakistan Integrated with it