[FMX] Navigation bar using arrowkeys

I have a selection of 5 buttons on my main page, each leading to other pages.
Now, I need to be able to select these buttons and click on them without using the mouse. So in other works, I need to navigate them using the Arrow Keys and the Enter button.

I was wondering what would be the best way to do this. I’m having a problem finding a tutorial for it. I did find away to do this but I can’t remember how I did it and the .fla file which I saved on Flash MX on a MAC, will not open on Flash MX on my PC? :os

Thanks in advance peeps!