Interacting loaded SWFs - procedure question

If we have an swf that loads for example two other swfs, then can a MC in the one loaded swf [color=#ff0000]‘talk’[/color] to an MC in the other loaded swf?

So say Main.swf loads Menu.swf and Map.swf - then can a MC in Menu.swf [color=red]‘talk’[/color] to an MC in Map.swf?

Or should the menu always be part of the Main.swf?

:ne: