How to change the title of manage_posts_custom_column

Hi,

After i create the Custom Post Type, i wanted to organize the List Columns to show my houses. Because i’m doing a house system, to show ‘n sell the buildings.
So, in my Custom Post Type, i don’t need title, editor ‘n thumbnail, but, if u see the columns (that part that u can see every houses ‘n edit, delete), ‘n the manage_posts_custom_column structure, u need the “title” because it can show the $post->ID ‘n show the manage options. But, i don’t need the title ‘n i want to change the title to another custom post. How can i do this?

Ex:

add_action("manage_posts_custom_column", "my_custom_columns");
add_filter("manage_edit-house_columns", "my_house_columns");

function my_house_columns($columns){
	$columns = array(
		"cb" => "<input type=\"checkbox\" />",
		"title" => "Type", /* I WANT TO CHANGE THIS */
		"region" => "Region",
		"city" => "City",
		"price" => "Price"
	);
	return $columns;
}

function my_custom_columns($column){
	global $post;
	$custom = get_post_custom($post->ID);
	echo $column;
	if ("ID" == $column) echo $post->ID; /*displays title, i want to change to display $custom["type"][0] but with the manage options*/
	elseif ("region" == $column) echo $custom["region"][0];
	elseif ("city" == $column) echo $custom["city"][0];
	elseif ("price" == $column) echo $custom["price"][0];
}

If u don’t understand, sorry, because i have bad english ‘n in the brazilian forum nobody helped me ??