I'm using MapPoint RenderServiceSoap interface to generate maps.

It works ok, except that I want the streets to be displayed thick, instead of spindly lines (i.e. one-pixel width).

I know MapPoint can do this, because the mappoint.msn.com site does it both ways when you click on Map Size = "big" (thick streets) as opposed to Map Size = "small" (spindly streets).

Does anyone know what calls are required on the server side to make this happen?