GoogleMaps - centrowanie mapy

Witam,
mam mapkę: http://www.scanerwww.pl/abc/floty/index.php?login=northwest&haslo=f5d1278e8109edd94e1e4197e04873b9&idusera=FORMULA

Mam na niej 2 rodzaje markerów. Ikonki google i samochodziki. Mapka centruje się względem wszystkich markerów. Chciałbym to zmienić,
i centrować mapkę względem samych samochodzików (ignorując centrowanie innych punktów)...

Mój plik z danymi wygląda tak: http://www.scanerwww.pl/abc/floty/points.php?idcudaka=&login=northwest&haslo=f5d1278e8109edd94e1e4197e04873b9&losowa=1831&idusera=FORMULA

A plik js tak:

var map = null;
var refreshTime = 5000;
var prevData = null;


	function load()
	{
	if (GBrowserIsCompatible())
	{
	map = new GMap2(document.getElementById("map"));
	map.addControl(new GLargeMapControl ());
        map.addControl(new GScaleControl());
        map.addControl(new GMapTypeControl());

        map.enableContinuousZoom();
        map.enableDoubleClickZoom();
        map.enableScrollWheelZoom();
	map.setCenter(new GLatLng(52.173931692568, 18.8525390625),5);
	GEvent.addListener(map, "moveend",function()
	{
	var ctr = map.getCenter();
	$.cookie('svc1', ctr.lat(), { expires: 365 });
	$.cookie('svc2', ctr.lng(), { expires: 365 });
	$.cookie('svz', map.getZoom(), { expires: 365 });
	}
	);
	GEvent.addListener(map, "zoomend",function()
	{
	$.cookie('svz', map.getZoom(), { expires: 365 });
	
	}
	);
reloadPoints();
	}      }

     function addPoints(data)
        {
	if (prevData != data || data == null)
	   {
var bounds = new GLatLngBounds();
		prevData = data;
		eval("points = ("+data+")");
		pointsCount = points.length;
		map.clearOverlays();

var bounds = new GLatLngBounds(); //do autozoomu
  var maxlng =0;
  var maxlat=0; 
  var minlng;
  var minlat;
		for (var i=0; i<pointsCount; i++)
		{
            var etykietka = points[i]['etykietka'];
			var point = new GLatLng(points[i]['lat'],points[i]['lng']);
			map.addOverlay(createMarker(point, points[i]['satellite'], points[i]['autko']));
			var label = new ELabel(new GLatLng(points[i]['lat'],points[i]['lng']), "<div style=\"background-color:#ccccff;border:2px solid black\"><small>"+ etykietka +"</small></div>", null, new GSize(6,-30), 75);
			map.addOverlay(label);

  	
  if (points[i]['coto'] == 'autko'){
    if (points[i]['lat'] < minlat){ minlat = points[i]['lat'] }
    if (points[i]['lat'] > maxlat){ maxlat = points[i]['lat'] }
    if (points[i]['lng'] < minlng){ minlat = points[i]['lng'] }
    if (points[i]['lng'] > maxlng){ maxlat = points[i]['lng'] }
  
}
lat = minlat + (( maxlat - minlat)/2);
lng = minlng + (( maxlng - minlng)/2);
//zmiany
//map.setCenter(new GLatLng(lat,lng), 5);
//var allpoints= new GLatLng(points[i]['lat'],points[i]['lng']); //autozoom
var allpoints= new GLatLng(lat,lng); //autozoom
bounds.extend(allpoints);
}

if($.cookie('ruch')=='on') {
if($.cookie('test')!=1) {
map.setCenter(new GLatLng($.cookie('svc1'),$.cookie('svc2')),parseInt($.cookie('svz')));
$.cookie('test', '', { expires: 365 });
} 
 
}
 
if($.cookie('ruch')=='off')
{
map.setZoom(map.getBoundsZoomLevel(bounds)-1);
map.setCenter(bounds.getCenter());
}
	    }
        }

        function createMarker(point, satellite, autko)
        {

        var icon = new GIcon();
        icon.image = autko;
        icon.iconAnchor = new GPoint(16, 16);
        icon.infoWindowAnchor = new GPoint(16, 16);
	var marker = new GMarker(point, icon);
	marker.value = satellite;
	GEvent.addListener(marker, "click", function(){
		var myHtml = satellite;
		map.openInfoWindowHtml(point, myHtml);
	});
	return marker;
        }

    function reloadPoints()
        {
	loadPointData();
 	setTimeout(reloadPoints,refreshTime);	
        }

Wiecie może jak to zrobić??

Z góry dzięki za pomoc,
pozdrawiam Northwest