Paul,
The Configuration Guide page below should give the instructions:
www.sourcecoast.com/jfbconnect/docs/conf...n-guide/overview-tab
Mainly, unzip the profiles zip file that was in the JFBConnect package, install the Kunena and K2 plugins, enable them, and go to the "Profiles" area of JFBConnect. In there are options to "Import Avatar" that should do what you're looking for.
Hope that helps,
Alex