A couple questions regarding Google Map widget

Hi,

I have a couple of questions:

1) Is there a way to add a service that will perform a "show-all" zoom function on the widget that will arrange its view to show all the points on the map?

2) Is there a way to place markers on the map that have a slightly different icon? For my case, I want to show all the sensors that are selectable on the map and then reference markers that display where the receiver stations are.

Thanks in advance!