I have gone through the mojoPortal documentation and forum posts to find a way to implement the following registration process. I greatly appreciate any direction that anyone can provide.

The site will have 2 types of users who will be able to self-register.

Standard User – This is a general registered use. No special requirements. Just the standard registration and login pages will work fine.

Examiner – An examiner is someone who has a background in psychology and is qualified to administer psychological tests. A user in this role must provide additional information to indicate his or her qualifications.

I would like to have a single registration page where a new user will be able to indicate whether they are registering as a standard user or Examiner. If registering as an Examiner, I want to prompt for additional information. I am planning to add custom properties to an Examiner role to capture this additional information.

Given this scenario, it it possible to:
1) create a dynamic registration process where a user will be prompted for different info depending on the role they have selected.
2) incorporate the rpx service.

thanks