Allow external affiliates to join up and sell - how?

hey guys... sooo...

http://www.shopezy.co.nz/affiliate

I came up with something like the above to get myself going then got stuck. I did try and use the membership plugin but it ended in everything being protected

so what I would like is people to be able to log in into this page and then once they are logged in, see there specific information re their affiliate

what I get now is, when they get signed up it goes off to a different location in the website AND the affiliate information is my affiliate info not the subscriber.

any ideas ?>