In SL5 you can create multiple windows. This package allows you to use a window modally, and not have it constrained by the parent window: http://slmultiwindow.codeplex.com/
Is there any way to control the containing window's background or opacity? I'd like to animate the appearance and disappearance of the modal window; while I can control the window content via storyboard, the containing window's white background sort of ruins the effect...
Any ideas would be appreciated for how to control the appearance of the containing window...