BuddyPress.org

well,The userbar and options bar are included in header.php using the following code

<?php if ( !bp_is_blog_page() && !bp_is_directory() && !bp_is_register_page() && !bp_is_activation_page() ) : ?>



<?php locate_template( array( 'userbar.php' ), true ) /* Load the user navigation */ ?>

<?php locate_template( array( 'optionsbar.php' ), true ) /* Load the currently displayed object navigation */ ?>



<?php endif; ?>

Check your header.php and you can remove it from there or assign somewhere else.

For editing userbar/optionsbar ,have a look at the userbar.php and the optionsbar.php

Check out them and change manually as you want.