Interaction between hotspot swf's

Hi all,

as the FPP documentaion leaves a lot to be desired concerning the Actionscript API, I have wrestled a couple of weeks with the question:

How do I make two swf's loaded as hotspots talk to each other, and how do I access Actionscript objects defined in one from the other? Do I have to go through FPP or does Flash itself provide some mechanism for doing that?

One of the swf's loaded is flvplayer.swf.

Regards,
Tommy