Flex 2 will require Flash Player 9, which has many new
features compared with Flash Player 8. Neither Flex 2 nor this new
player are officially released yet, but there is a download of Flex
2 Beta 3 available at www.adobe.com, and the version number of the
player included with it is 9.0b296.
I'm sorry, but I don't know what you mean by exporting to
archives .swf. Can you clarify?