Quote from PhanxThat's because it's not possible; Alt, Ctrl, and Shift are the only keys that can be used as modifiers in secure environments such as action bars/buttons.
The closest you could get would be to bind the F key to a macro that swapped between two pages, or cycled through pages in a fixed order, each time you pressed it. However, using this method would limit you to the standard 6 actionbar pages, and you would not be able to hold F, use an ability on the second page, and then release F to return to the previous page. You would have to press and release F to switch to the second bar, use the ability, and then press and release F again to go back to the first page.
That is what I was afraid of I suppose I'll just have the action bars out and use key-binds for the different key sets. Thanks for the help.