Thanks 'catymag' I managed to get that to work. But it doesn't get the maps into Basecamp (the map (OZ & NZ Topo) ) so I can use it on the PC...i have to remove the microSD from the Montana every time I want to use it in Basecamp. I have Canada Topo installed into Basecamp, but I think it was an installer that did it.

I will keep reading & searching...try...try...again :-).