How to replace City Nav 6 onto Nav II with City Nav 8 ?

I have a Nav III with City Nav NT 8 preloaded and the disk and installed in Mapsource, etc. How do I load ver 8 onto my "old" City Nav II+ which still has City Nav 6 on it?
Do I just highlight the entire North America and Puerto Rico and transfer it to the Nav III using maps?
BTW, that doesn't work. The Mapsource won't bring up the Nav II if I try to do that. But I can bring up the Nav II as a device for other tasks. So this isn't a USB device issue, etc.
Anybody do this?

Mapsource Differences

I believe that the Nav II is BMW equivalent of the 2610 and Nav III is the BMW equivalent of the 2820.

The Nav III/2820 uses City Nav NT Mapsource. The Nav II/2610 does not. It uses the City Nav. Therefore it will not load City Nav NT 8 maps. It will load the way points and the routes. I now this from experience.

Look at the Garmin site there is City Navigator NT 8 and City Navigator 8. I guessing the difference is that the NT versions are necessary for 3D viewing of the maps on the unit.

Mudbug said:

I believe that the Nav II is BMW equivalent of the 2610 and Nav III is the BMW equivalent of the 2820.

The Nav III/2820 uses City Nav NT Mapsource. The Nav II/2610 does not. It uses the City Nav. Therefore it will not load City Nav NT 8 maps. It will load the way points and the routes. I now this from experience.

Look at the Garmin site there is City Navigator NT 8 and City Navigator 8. I guessing the difference is that the NT versions are necessary for 3D viewing of the maps on the unit.

Click to expand...

Thanks much. That gives me some insight. I also have City Nav ver 7, so that will have to do unless I buy 8. Thanks again.

I loaded version 8 on my NavII and all you do is to load the CD into the computer first and when the screen gives you the choice of which model to update you select the one listed as "other models" due to the fact that the 2610 is not made anymore but is supported though not by name specifically anymore. I had to contact Garmin directly to find that out as there was nothing on the site to suggest that course of action. All else is done automatically. Then connect the NavII to the USB or the memory card into a reader and select maps to copy over as one would normally do. A tip is to ensure you have the latest update on the receiver itself prior to the new maps.

I checked Garmin's site. City Navigator 8 is compatible with the 2610. The 2610 is not listed as being compatible with the City Navigator NT 8. The list for the NT version needs to be updated because it does not list the 2820, which is compatible with it.

Mudbug said:

I checked Garmin's site. City Navigator 8 is compatible with the 2610. The 2610 is not listed as being compatible with the City Navigator NT 8. The list for the NT version needs to be updated because it does not list the 2820, which is compatible with it.

Click to expand...

Thanks for the info again. When ver 8 NT came with the Nav III, I thought I'd put it on the Nav II also. But, I guess I'll put ver 7 on the Nav II since I own it and maybe not buy ver 8 (non NT) for it. I didn't realize the difference between ver 8 and ver 8 NT.