Complex interactive content in Flex?

Hey all,

I’m a seasoned Flash developer and have just recently switched to Flex, but so far I’ve been having a hard time with creating the right kind of components. For instance, in Flash if I wanted to add a complex interactive menu, I would have a menu clip in the library, then export it for ActionScript, assign a class to it and add it to stage. How would I do something like this in Flex? It seems all I can do is expand the UI Components, and none of them is really suitable for what I want to do. Is there a way to create a movie clip in Flash and use it in a Flex project?