How to have simple sign up for member and pay with one of 5 PayPal buttons?

How do I accomplish this in Membership plugin

NO protected content,
5 Membership levels (subscription levels),
Many custom fields on the Sign up form (register/account)?
(I installed BuddyPress for extra fields)

From a menu click--
Either :
Custom Form signup -> Select Member Level -> PayPal
or :
Select Member Level -> Custom Form signup -> PayPal

Is this possible with Membership?