Best Answer Evan Mattson , 10 June 2013 - 04:25 PM
Sidekick is not just for child pages. There are 2 modes of display that determine how the menu is populated: Page Hierarchy (child pages - but more than that), and WP Menu.
So, using WP Menu mode, you can display any menu you have created in Appearance > Menus. The mode, as well as the menu you want to display can be changed on a per page basis using the PageLines Meta Settings.
If you haven't seen the demo, check it out here: http://sidekick.evanmattson.comGo to the full post