Full code after the jump.

View MXML

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2007/10/03/displaying-images-from-an-xml-file-using-the-repeater-component/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <mx:XML id="imagesXML" source="images.xml" />

    <mx:Zoom id="zoom" />

    <mx:HBox id="hBox">
         <mx:Repeater id="rep"
                 dataProvider="{imagesXML.image}">
            <mx:Image source="{rep.currentItem.@src}"
                    toolTip="{rep.currentIndex}:{rep.currentItem.@alt}"
                    completeEffect="{zoom}" />
        </mx:Repeater>
    </mx:HBox>

</mx:Application>

images.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2007/10/03/displaying-images-from-an-xml-file-using-the-repeater-component/ -->
<images>
    <image src="images/Button.png" alt="Button" />
    <image src="images/ButtonBar.png" alt="ButtonBar" />
    <image src="images/CheckBox.png" alt="CheckBox" />
    <image src="images/ColorPicker.png" alt="ColorPicker" />
    <image src="images/ComboBox.png" alt="ComboBox" />
    <image src="images/DataGrid.png" alt="DataGrid" />
    <image src="images/DateChooser.png" alt="DateChooser" />
    <image src="images/DateField.png" alt="DateField" />
</images>

View source is enabled in the following example.