Passing through createNavigationGroup for ios 7

Hi All

I have a app working with a tabgroup and i pass through the navigation like this which works.

var baseWindow = Ti.UI.createWindow({
        navBarHidden:true
    });
 
    baseWindow.orientationModes = [Titanium.UI.PORTRAIT];
 
    var win1 = Titanium.UI.createWindow({
        backgroundColor : '#fff',
        titleControl : Ti.UI.createLabel({
            text : 'Title',
            color : '#ffffff'
        }),
        url : 'ui/tab3.js'
    });
 
    var nav1 = Titanium.UI.iPhone.createNavigationGroup({
        window:win1,
    });
    baseWindow.add(nav1);
 
    win1._navGroup = nav1;
 
    tabGroup.addTab(Ti.UI.createTab({
        title : 'Title',
        icon : 'icon.png',
        window : baseWindow
    }));

Has anyone managed to do this?

Thanks