Is it possible with either the core product or with a custom module to automatically move a user into a security role based on their payment for a subscription?  I was hoping that by configuring a role and a payment processor, that when a user attempts to add themselves to the role, that they would be directed to the payment process (PayPal) based on the PayPal login.  However, that doesn't seem to be the case.  So, is there a way to do this with the core?  And if not, which 3rd party module would you recommend to do this.  What I'm looking for is something that works similarly to the Catalook PayPal payment process, except that I want a user to be moved into a security role after a successful payment...

Thanks for any hlep or guidance...

Catalook will also add a customer to a Role on purchase and set the expiration and/or recurring payments.