With ISBoxer, the video in my sig is true to its statement. Use the Quick Setup Wizard, select the characters, pick from a few simple options, click finish, and you have FTL on 1 through =. So it would work on your Naga without any extra work, just set in 1 through = mode as opposed to the numpad mode.

For an added bonus.. you could change it to only broadcast/ftl from your Naga by switching it to numpad mode and change the hotkeys in ISBoxer's FTL DPS map to match the numpad keys. Then pressing 1 on your keyboard has normal behavior, but pressing 1 on the Naga pad can add the broadcast with FTL. Or you could do the opposite.

You might have to run the Razer software as Administrator to allow it to work alongside ISBoxer