I was looking up a help file in Flash. You know right click “View Help”. I got to thinking, surely FDT should be able to do the same thing. I took a look and low and behold it did. IF you(FDT3):
Window -> Preferences -> FDT -> Tools -> Flash Help
As long as you installed Flash in its default location simply hit “Apply” reset eclipse and you will have access to the help by pressing “F1” on any Flash key word.