Setting paypal subscription button on registration page

Hello All,

I am using your membership plugin in my jobsharing membership site with buddypress where user can find some basic content as guest and if want more content then they want to subscribe with membership plugin.

Current the subscription process as follow
1. user click on registration button then redirect to page where all subscriptions option is displayed.
2. when choose any option then redire to signup page where they fill all the details like username, password first name etc..., after click on sign up button they redirected to page where subscription button is displaye

3. After clicking subscribe button they can become a member.

My Question is that i want to add the last paypal subscription button on registration page, so user can fill details like username, password, email and click subscribe button to become a member

Any Help Appreciated !
Than you