Wordpress widget how to only display sub-categories based on selected Parent Category?

Question

I was wondering if anybody know hows to modify the existing category widget to only display the categories within the selected parent category. Example:

If my catego

Answer 1

how about using something like this? on a singles page you could add a call from within the single.php page to a new sidebar or an include file...?

ie:

newsidebar.php

 
cat_ID;
    wp_list_categories('orderby=id&child_of='.$myCat); 
?>

this will show only categories from the currently used category?

ie:

if current category is 5 // Computers then all that will be shown in the list is

* Laptops
* Desktops
* Software