To clarify are you looking for keystroke broadcasting only, or both mouse click and keystroke for the action bars?

For keystroke only, it should be fairly straight forward, you could even copy & paste the existing 1 thru =, and just change them in isBoxer (though you'd be better off using the keymap wizard as explained in the tutorial above). Remember that you have to set the right key as the key bind in game too, isboxer can't do that bit for you.

If you want the option to click also, using the "green menu bar" that is used, you will need to create a new menu to overlay on your new action bar, too. That, I, unfortunately can't help you with as I have opted out of using mouse clicks for actions (it was a habit I wanted to break for even single player), so I have that disabled.

Someone here will be able to assist though, though you could probably scour the isboxer forum for an answer too!

Also, remember that WoW uses some modifier+number by default, for example pet bars default to crtl+1 through 7 (I think), if you want to use those keybinds for something else, make sure they are no longer assigned to pet action bar in game.