BuddyPress.org

hi!!
I’m doing a community using buddypress, and I’ve a problem, i want to make a new element on header , like Groups, Forums, Memebers, Blog, Home, etc.
I modify the header.php on bs-sn-parent, an put a new list, calling a new file, teams.php
but in this new file i can’t put code like “get_header()” or “get_footer()”, how can i put it?

in header.php I’ve this line

<li><a href="/wpmu/wp-content/themes/bp-sn-parent/directories/Teams/teams.php">Teams</a></li>

Thanks and sorry for my english 😉