[support] Rendering views filters as checkboxes and radio buttons, instead of select boxes and drop down menus

Hi,

<a href="http://drupal.org/node/138374#comment-276845">This patch</a> to the <a href="http://drupal.org/project/formtweaker">Formtweaker</a> module, modifies views filters, so they render as checkboxes and radio buttons, instead of select boxes and drop down menus.

This is quite important, from th usability point of view (many people don't know how to properly use select boxes).

Currently there is no way for a user to choose between rendering an exposed filter as checkboxes/radio buttons, or as the default select boxes.

How is it done? How do I add this condition (as a checkbox in the exposed filter section I guess) to the views ui?

Thanks, Zohar

(ps: I posted this question on groups.drupal.org, but had no reply)