BuddyPress.org

You could do something like this instead of your normal registration function:

function activate_extension()

{

global $bp;

if( is_site_admin() )

{

$extension = new Your_Group_Extension_Class_Name;

add_action( "wp", array( &$extension, "_register" ), 2 );

}

}

add_action( 'plugins_loaded', 'activate_extension' );