The map is on a Sd card. I have copied all the files then deleted them. I opened the gmapsupp folder and dragged the img file onto the gig unlock icon nothing happened? I then dragged it back to the sd card in the GPS. this took ages.

The sd card still works on the 62GPS but nothing shows on the Astro but it does show the map GB discoverer as enabled.

Im not sure what you mean by "open a terminal window" and I certainly don't know what the correct path on the card is or where I use it!

This is quite frustrating!!