Drupal 6: Membership types and registration modificatio

Hi!

I am developing a website in drupal 6 and I have two different profile types (with different profile content fields). Now I want to let users to register and chose which type of profile they want and after chosing that let them fill in the profile fields that are available for that type of profile. It is actually exactly like the module "Membership types and registration modification", but that one isn't available for drupal 6. Does someone know if there is a module for drupal 6 that does what I want?

Thanks in advance :D

Greetings,
Jessica