Including link to custom post type in ‘wp_list_pages’ function

You’re not able to classify a custom post type as a page, because as the name itself states, it s a custom post type (therefore not a page).

In your case, and for making the management of your menu(s) easier in the future, I would strongly recommend that you add a ‘Menu’ to your theme.

  1. First Make sure you are using WordPress 3.0 or later.
  2. Secondly, follow this easy tutorial to add a Menu to your theme.
  3. Lastly, you will be able to create a menu using the interface found in Appearance > Manus and items to it as you please.

Well I hope that did the trick for you! Let me know how it goes.