We currently have multiple RadEditor's inside an IFrame and we want the standard dialogs (RadWindow) i.e. ImageManager to be displayed on the topmost page. At present the dialogs are restricted to the IFrame of the RadEditor.
We have fixed the problem by setting the editor to use classic dialogs (editor.set_useClassicDialogs(true)), however this doesn't prevent the user from clicking on the toolbar and we require the dialogs to be cross browser and modal i.e. use div elements.