Import fl components into Flash Builder

Download fl packages
http://apdevblog.com/update-using-flvideo-package-w-eclipse-and-fdt3/

Export fl.* components
http://joshblog.net/2008/02/10/how-to-use-the-flash-cs3-component-set-in-a-flex-builder-actionscript-project/

add above swc to the build path of your flash builder project.