phpbb3 drupal5

how would one go about adding new profile fields (using the core profile module in drupal5) so they show up in phpbb profiles? such as "ICQ number:" etc.

Please excuse me if I'm asking a terribly redundant question here, I read through the posts, but haven't found the answer. But I've just got the phpbb3/drupal5 mod working and am now wondering how to import about 85 users from an existing phpbb2 forum. Should I first upgrade it to phpBB3, then copy the user information over just as if I were moving from one installation to another without drupal?

If this has been posted elsewhere, please refer me to the location.

Thanks!