6 string references to 'user_register' in Drupal 5

theme_comment_post_forbidden in modules/comment/comment.module

user_admin in modules/user/user.module

user_admin_settings in modules/user/user.module

user_login_block in modules/user/user.module

user_menu in modules/user/user.module

Implementation of hook_menu().

user_register_submit in modules/user/user.module