BuddyPress.org

Hi,
I have the profile fields plugin but its not REALLY doing what I need. I need to have a simple process that goes as follows:
1. UserName and Password
1a. Referral Code or Name
2. Full Name
3. User Name
4. Child 1 – Age – Male/Female – Twin
5. Add another child (same as above)
6. Add profile pic, choose from 2 preset ones, or upload
7. 3 questions
8. Join

The only real problem I am having is the child addition with the sub fields for those.
Also, I dont want to use the actual registration page, I want to embed on another page and after 1. go to a secondary page.

Thanks