- Install autoassignrole, content_profile, cck, token modules.
o http://drupal.org/project/autoassignrole
o http://drupal.org/project/content_profile
o http://drupal.org/project/cck
o http://drupal.org/project/token
- Create 2 or 3 roles at role creation page, http://yoursite.com/admin/user/roles.
- Goto http://yoursite.com/admin/user/autoassignrole, click on Allow users to choose fieldset. Automatically you will get the list of Roles. Select the roles you want to provide on registration page. So that users can able to choose roles at the time of registration. You can choose user input option like list box, Radio, Select box etc.
- Now goto Registration form http://yoursite.com/user/register and try to register, you will get option to select user role.