NPM Groups (Custom Maps).

Hi,

I have various groups defined in NPM, e.g.

Area 1

Area 2

Area 3 ........

And I want a custom map of the equipment in that area to be displayed when I click on the group, but when I choose a map for one group it then puts the same map on all the other groups.

I know it's probably something stupid that I'm just not seeing, but how do I achieve what I've set out to do?

Regards

Greg