Edit Sidebar Menus in Profile & Events

I have been getting familiar with all the customization options and the differences between widget and module integration's. My last task is to edit my Sidebar menus. I have gotten into the default.php files and most are very clear... with a few exceptions. Like the Calendar with the Event Sidebar Menu... does not seem to be in the default.php code! Or perhaps it is being called with a smaller line of code than other menu items. Another example of this is the INTRODUCTION top section of the profile.

Any help in finding these hidden menu items would be appreciated.

Thanks again
Mark