DVD Navigation Map

Hello there,
Please i need directions and guidance concerning Car DVD-Navigation Map.
I have some GPS Handheld devices, Gamin, and also have Mapsource on my PC. I usually transfer my maps from Mapsource to my GPS device.
But i’m hoping i could do the same for my Car DVD Navigation. Pls advise if there’s a way to transfer d maps from my PC (laptop) to my car.
I’m an IT/ICT expert, i’ll understand all your terminologies. There shud be some sort of reprogramming on the DVD NAV System…
Thank you so Much.

I doubt this will work.

Even with devices from the same company its unlikely to happen.