JFBC oder Jomsocial questioN=?

Í work with Jomsocial but with JFBC Facebook login and if someone login with Facebook the username is like (as example):
fb_1069720916441989
How i can set up that if a new member registred through facebook that he has to set a username, about me field and other fields?

I post the same in Jomsocial forum:
here the answer:

USER wrote: Hi, Henning.

Thank you for contacting us.
I'm sorry to hear you have issues... but this one seems to be caused by JFBC.
Please, contact with JFBC developer and report it to them.
If they will need our help in this - please ask them to contact us directly.

That works perfectly.. I want make a description after website and facebook ( if this does not work- after the contact information is okay too) - So i make a new field in JFBC language folder that calls "COM_JFBCONNECT_FACEBOOK". Now i think I am right that i have to insert the COM_JFBCONNECT_FACEBOOK here: components/com_jfbconnect/views/loginregister/tmpl/default.php like that:
<dt><label><?php echo JText::_('COM_JFBCONNECT_FACEBOOK') ?> </label></dt> but I dont know where I have to insert the line of code because I never work with php. Can you tell me how that works ?
On think more ( thats maybe a template problem not a JFBC problem) the fields on website and Facebook - left and right are not at the same (height position) and not similar big -> Can you tell me how i can fix that ?
Mabye you dont understand what i need so I did a screenshot with paint:

Here the register link;
os-vp.de/index.php/register/