I've been banging my head all day on this. I know you can open a window and then say have a button that when clicked opens another window from inside that.
See here for a demo: http://plnkr.co/edit/vl2VTi6EIXKcViwl1xae?p=preview
In my project however I am trying to do the same thing but instead of working as expected it is rendering the kendo windows inline (as if they are just divs with content in them).
When I swap out the version of kendo I am using (v2015.3.930) with the version inside my plnkr (2014.2.716) my kendo-window divs are no longer rendered but they also still do not work.