Details on how to configure this seem hard to come by...
So far I have tried:
Site Settings -> General Settings -> Dynamic Pages tab entry of viewpage.aspx with query string variable of contentid
Site Settings -> Page Aliases -> New Page Alias with /viewpage.aspx?contented=123 and alias of About Us.
Reprocess logs - wait hours - view reports... nothing changed in any of the reports (Top Pages, Top Dynamic Pages, etc.)
What am I missing here?