Using flash, flex, AS2 and AS3 together

Hi all,

We are currently developing an author environment for a flash GIS mapping application.

The author environment is developed in flex, so it uses flash 9, actionscript 3.

It would be nice to load the author environment on top of/floating above the flash application. Is this possible? As the GIS flash application only uses flash 8, AS 2.

As far as I know, it is not possible to load the flex application, strait away from the flash 7, as2 application (scenario 2) so we think of a as 3, flash 9 container clip (scenario 1) which then opens the flash map application and flex author.
Scenario 3 would also be an option. GIS application compiled to FL9, AS2 which opens the author.
The most ideal situation would be the GIS flash application on the root. (because of javascript API)
Which scenario is the best? If you have any other creative idea, please let me know.
See the attached jpeg scenery sketches for more clarity.
With best regards,

Steven van Rij