Worksite Web 8.5 BrowseDlgEx

System

Is there anyway to have BrowseDlgEx display multiple workspaces? using the documentation I can make it open with only one workspace at a time, Ideally it would open with a group of workspaces that I would define somehow in the URL.

also, is there a way to have it open so you can search workspaces AND documents? by default you can only select or search one or the other, depending on how you define the context= parameter.