Even newbe I will try to help you.
Key is in changing mapmask in every scene. What I did wrong at the beggining was that my PNG was not correct. I tried to hide layer in PSP when exporting mask in PNG. That was wrong. Now I open main map, create new layer for mask, create selection, fill it with white, delete main layer with map, export mask as png and than undo delete last layer to keep them all in one psd for later usage.
I am updating mask like this:
<!-- SET RADAR MASK -->
set(plugin[mapmask].url,"%HTMLPATH%/images/mapmask_mask1.png" );
action(updatemask);
action(activatespot, mappoint_room1_tour2,180);
Hope this help. If not than gurues will jump in.
regards