How Do I Control Registration Destination URL and keep separate from Login/Connect?

Team WPMU,

I would like to have the option for members to register for my network via Facebook, but after registration there are some specific questions to be answered. I know there is an "On Login" URL that can be specified, how can I tailor the destination URL for new members after registration?

When an existing user logs in, I want them to stay on the current page they are on (seems to be the default of the plugin).

But, when registering (and ONLY when registering), I want them to go into the registration process and onboarding tutorial. How can I do that?

Thanks!

Rob