Hi Stuart, Is there a specific sample you have in mind? There are some 100+ samples and depending on which one you are trying to implement in the Flex Viewer, the best solution would differ.
In general when extending the Viewer, the best option is usually to create a new widget. See for example: Creating a Custom Widget
Thanks Robert, I was able to implement it but I was looking for something like they have in the samples. Where you can hover over a cluster and they spread out giving the user the option to click on one to receive an attribute infowindow. Would it be difficult to make that sample a widget?