For User Assign Role, users can choose fieldset

Hi,

I am intending to use Auto-Assign Role and was thinking about having these additional feature. (Here and at http://drupal.org/node/361414)

For User Assign Role, administrators would be able to define the field-set which the User role assignment will appear in when the user registers. The administrator will also be able to set the weight within the category of the field-set.

I have included images which I have created to explain in more detail, just in case I'm not clear enough. http://jkello.wordpress.com/2009/01/20/feature-request-auto-assign-role/

What do you guys think of this feature?