We don't have any built-in integration for JSPT in JFBConnect. We know of many users who have both JSPT and JFBConnect working together on their site, but most use the different registration flow where a user selects a profile type after registration. With JFBConnect, we recommend enabling Automatic Registration and then setting up the "New User Redirection" page to force the user into JSPT's "Select Profile" layout. With that scenario, the user already has an account, but is still able to select and fill out their profile.
Unfortunately, we don't have any method to integrate with JSPT where we can detect which profile type the user selected beforehand.
I hope that helps explain, but if there's any other questions you have or think we can help with, please let us know.
Thanks,
Alex