If you are using the Profile 2 module to set up multiple profiles in a Drupal website, and you want each visitor to register any new account using only one of those profiles, then you should redirect the Drupal path "user/register" — using a URL alias or an HTTP redirect — to a new page that explains the different profiles and has links to the unique registration pages for each one. (For any profile P, the Drupal path to the profile-specific registration page would be "/P/register".) Otherwise, a visitor may arrive at the generic registration page (intentionally or otherwise) and create a new account independent of those profiles.
