Keyboard navigation beyond the Tab key

Is the Tab key the only keyboard event I can use to change focus on the stage? I’d also like to use the arrow keys.

What monitors the tabIndexes in the flash file? Can I assign tab indexes and then use the arrow keys to move the index number up and down to toggle around my display? Or am I stuck with the tab key?

I don’t want to navigate. I need to trigger the focusIn and focusOut events of the various clips on the stage as the user interacts with the keyboard.