Replace JomSocial Hellome (login and logout) by JFBC (login and logout

Roger,
No problem for the support, it's what we do.

There's no way to directly redirect a module. You can only redirect to pages on your site. What I think you'll want to do is:
1) Create a new instance of the JFBCLogin module. Set it to a position of "jfbclogin_redirect" (or whatever you want). You'll have to type this position into the Position box.
2) Create a new Joomla article. In that article, you can give instructions if you want.. but most importantly, add the following tag:3) Save the article, and take note of the article ID.
4) Setup a redirect in the Redirect component of Joomla:
Source URL: index.php?option=com_community&view=frontpage
Destination URL: index.php?option=com_content&view=article&id=XXX (where XXX is the ID from #3 above)

Hopefully, that gets you going.. but if not, or you run into issues, you know where to get help!
Alex