Simplying registration and reminder to complete the rest.

[GossipAll]

Hello,

I want to simply my forum's registration process, so that the fields contain only:

1) Username
2) Password
3) Email
4) Captcha

But when the members registers and login (or don't login), they should be reminded of completing the rest of the registration fields like, Gender, DOB, Location, other profile fields, either through PMs or Emails or a Header Notice or all three with a time gap of 7 days or so.

Can this be achieved?

Thanks