Bing Silverlight控件中的自定义渲染

I'm ramping up on a Silverlight 2 project that leverages the Bing Maps control. One thing our UX guys are wondering is whether it is possible to customize the look of the map completely. For example, draw countries as simple outlines with different color interiors. Or draw the ocean as white and countries as black dotted shapes.I'm ramping up on a Silverlight 2 project that