Tips on Customizing MediaPress

How to Hide MediaPress Admin Menus

function plt_hide_mediapress_menus() {
	//Hide "MediaPress".
	remove_menu_page('edit.php?post_type=mpp-gallery');
	//Hide "MediaPress → All Galleries".
	remove_submenu_page('edit.php?post_type=mpp-gallery', 'edit.php?post_type=mpp-gallery');
	//Hide "MediaPress → Add Photo Gallery".
	remove_submenu_page('edit.php?post_type=mpp-gallery', 'http://127.0.0.1/wp-admin/post-new.php?post_type=mpp-gallery&mpp-gallery-type=photo');
	//Hide "MediaPress → Add Audio Gallery".
	remove_submenu_page('edit.php?post_type=mpp-gallery', 'http://127.0.0.1/wp-admin/post-new.php?post_type=mpp-gallery&mpp-gallery-type=audio');
	//Hide "MediaPress → Add Video Gallery".
	remove_submenu_page('edit.php?post_type=mpp-gallery', 'http://127.0.0.1/wp-admin/post-new.php?post_type=mpp-gallery&mpp-gallery-type=video');
	//Hide "MediaPress → Settings".
	remove_submenu_page('edit.php?post_type=mpp-gallery', 'mpp-settings');
	//Hide "MediaPress → Tools".
	remove_submenu_page('edit.php?post_type=mpp-gallery', 'mpp-tools');
}

add_action('admin_menu', 'plt_hide_mediapress_menus', 11);

Where do I put this code?

How to Hide MediaPress Meta Boxes

function plt_hide_mediapress_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Gallery Admin" meta box.
	remove_meta_box('gallery-meta-upload-advance', $screen->id, 'mediapress');
	//Hide the "Shortcode" meta box.
	remove_meta_box('mpp-gallery-shortcode-viewer', $screen->id, 'side');
}

add_action('add_meta_boxes', 'plt_hide_mediapress_metaboxes', 20);