Nested Pages other than text and graphics

In navigators, is there a way to nest pages other than text and graphics? For instance could I have a slide-show on one tabbed page, and an interactive in another? (Details don't matter - they could be any other pages that can't be made by the source editor)
I can see how to make a link to another page in Xerte, but not how to load it.
I suspect that the answer is "No",