How to get one specific group to display in mode group

Hello,
I would like to make a custum copy of mod_easysocial_groups but where I choose, pragrammaticaly by id, wish group to display.

So I tryed editing default.php : (where "4" is the cluster id)

<?php

defined( '_JEXEC' ) or die( 'Unauthorized Access' );

$group = FD::group(4);

?>

<div id="fd" class="es mod-es-groups module-register<?php echo $suffix;?> es-responsive">

	...

</div>

I'm far of the truth or could it be a good way ?