buddypress scholar with 4 page templates – How to choose them?

BuddyPress Scholar comes with 4 page templates: full width, sidebar left, sidebar right and 3 columns.

How to choose them on page of BuddyPress (Group, Member …:wink:? I’m looking forward to each page of buddypress is true “full width” page

Ex: http://ghostpool.com/wordpress/supermassive/buddypress/groups/, http://ghostpool.com/wordpress/supermassive/buddypress/members/ ….

I’m setting up multisite with BuddyPress Scholar child theme

How to remove

Please log in and add widgets to this column. Add Widgets

ex: http://buddypressthemes.org/groups/

on single page of BuddyPress Scholar theme?