Sorry for the confusion. We'll definitely look at our configuration guide to see if we can explain some things better.. which obviously, we probably can.
For the profile plugins, you'll need to unzip that file first. The profile plugins inside will work for Joomla 1.6 and 1.7 sites, but not Joomla 1.5 sites (we don't like Joomla's numbering scheme either). Once unzipped, just install the profile plugins for the components you'd want to import a user's Facebook profile into.. which sounds like just JomSocial.
Once JFBConnect is setup, you shouldn't use JomSocial's Facebook integration, and should leave the API/Secret key in their configuration area blank. You likely won't be able to use their invitation feature, but we honestly haven't tried. JFBConnect does have it's own JFBCInvite module, which is different than JomSocial's, but works quite well. For more information on JomSocial integration, and some common questions, see:
www.sourcecoast.com/jfbconnect/docs/thir...ration-for-jomsocial
Hope that answers your questions,
Alex