We can override Additem in States see this is simple states example in Mxml



This is  override custom states example



you can download source code here

This is very Simple Image Galley in Flex and it has xml data inside the Mxml

You can download Source file here

This is beautiful Flashtagcloud and it is XML based so we can customize to our needs
 

You Can Download the source code here

This is Example code for how to Google Map in Flex 3.0


Google Map to locate your destination

Source Code is here