We don't have a method to spread registration across 2 pages. We'd honestly recommend considering importing as much information from Facebook as you can, and then hiding the fields that have imported data. Users that register using Facebook generally are expecting a very 'quick' registration process. If you force them to answer a lot of questions, from our experience, it will decrease your registrations drastically. Of course, some sites need all that information up front, but I'd really recommend verifying it's all required at the time of registration.
As for the view itself, you can copy /components/com_jfbconnect/views/loginregister/default.php to /templates/<YOUR_TEMPLATE>/html/com_jfbconnect/loginregister/default.php and edit it there. That creates a template override so your changes aren't erased when you upgrade.
Both sides of the form (login and register) have quite a few div's and classes on things to let you modify as necessary through CSS as well.
Hope that helps, but if you need more info, just let us know!
Thanks,
Alex