[consulting] Users and content types

[bigjoe at lab.matcom.uh.cu]

Hi!
I have a Drupal site and I would like to attach to the user's profile some
information whose type is a content type of my site. How to do this?
For example, I have the "Group" content type, and I want the user to see
at register time, a select list or a combo box or something like that,
whose values are the "Group"'s created at the moment.
There is some idea?
There is some idea without using taxonomies?
Thanks!