Re: Is there any way to incorporate elements from the 2006 namespace in an application that uses the 2

Most people map the "fx" prefix to 2009, then map mx to the following:

xmlns:mx="library://ns.adobe.com/flex/mx"

Then, if the mx.swc is in the project's library path, you should be able to use the mx: prefix like you did with 2006 except for places where "fx" is now used.