RT,
We're planning to implement a new registration flow that will let you use other extensions in the upcoming v5.2 release. We're expecting that release to be out around the beginning of November. We'll be working on a JSPT plugin to prefill registration data and import into that extension, but I'm not sure if it will be ready for the initial release of v5.2.
I hope that helps explain and give you a timeline on when things should could starting working between JFBConnect and JSPT. We're definitely excited about the prospects.
Thanks,
Alex