user profile 'url path'

Hi all

I really need some big help creating a url path so the path for the user profile looks like this www.example.com/username
Currently using drupal 6.

I currently enabled clean urls so the path for the user profile looks like this: example.com/user/5
I did see a solution with url aliases with the pathauto module. it does cure the problem to map the username properly to be more like example.com/user/username. its not quite the method I wanted but its better then remembering the number at the end. This setting was under user path section of pathauto.

However, if you get fresh new users signing up, pathauto wont update the profile url. And the path will be the 'example.com/user/5' path.
Hence, you have to keep going into pathauto user path settings and select 'Bulk generate aliases for users that are not aliased'
which is a pain to do when you got users signing up constantly.

Is there any suggestion that can fix this? Or is there something I miss out?

Thanks in advance.

-Mallet