Portal page popup with empty theme and empty skin

In the How to open a portal page in dialog box entry i built a sample portlet that opens portal page in dialog box.

But if you open a portlet in a dialog box then displaying the full portal page with navigation, tool bar,.. does not look good, so i did create a Empty theme and Empty Skin that does not display any of the additional markup instead only returns the markup generated by the portlet.

This is how my popup dialog box looks like after adding empty theme and empty skin to it