Well, since Flash CS4 isn't officially released, the only
people who have it are official beta testers or people who somehow
got an illegal copy of one of the beta versions. If you're not one
of the beta testers, it may not be such a good idea to go
announcing on the official Adobe forum that you have a copy.
But Adobe has released the Help files for CS4, which can be
found online (I think there was an announcement on this forum last
week), so you might discover the answer to your question