No, unfortuantally not. It fit was I would catagorise the speed cameras and have different icons for different types (GATSO, Mobile, SPECS etc.) on the screen together.

The only exception is that you can have 'city center' icons as well as one other POI if you are the 450 yard scale or less. I tried changing the City Center icon and points, but it does not work so I could have one fixed POI and one selectable but it did not work, you still get 'rings' icon at your selected points.