Need help with dynamic xml vales in combobox component

Hi people
I am trying to incorporate a dropdown menu to hold the titles for each image in an XML slideshow gallery
I am just wondering if I am able to make use of the default Flash ComboBox component to make all image titles be displayed in the dropdown menu
Have surfed around a bit for examples but most of them are using their own customised movie clips to hold all the items in the list
They are too hard for me to understand and some uses complex xml
The .xml file I am using is the most basic
<images>
<pic>
<image>images\1x1.jpg</image>
<image2>images\blank.gif</image2>
<image3>images\blank.gif</image3>
<caption>Layout 1</caption>
</pic>
<pic>
<image>images\2x2_1.jpg</image>
<image2>images\2x2_2.jpg</image2>
<image3>images\blank.gif</image3>
<caption>Layout 2</caption>
</pic>
</images>

caption tag refers the the title of the images and i want a whole list of them to appear in the dropdown
Can someone tell me how to incorporate them into a default Flash Combobox component using my very basic type of xml file?
Any examples will be appreciated. thanks so much!