Any Flash CatalystCS5 users that can help with terms for XDP6 and Flash CatalystCS5 work flow?

I finished a site using XDP6.
As a test I am building the same site in FC, but
it seems FC does not have the equivalent of Xara's "Placeholders" and that's the terminology I'm looking for. If it does, I don't know what it's called.

Can iframes, or placeholders be created in FC?