nkActionBarSwitch does only one thing: If you push down the CTRL key it will replace the main action bar with the second one. Nothing more and nothing less.
I built this addon as I'm using a Logitech G13 keyboard. Allthough it features 22 main keys only 14 are really accessable for me. By using this addon I can bind the CTRL key to one of the keys next to the joystick and voily I got 28 keys easily accessable :)
Also it helps a lot in gettings much more keys while maintaining a cleaned up user interface.
You will need to set the keybindings for the main action bar as you are used to. For the second action bar you simply use the same keys + CTRL.
As soon as you hit the CTRL key the addon will replace the main action bar with the second one. It will position it at exactly the same coords the main action bar is positioned.
For me the addon works perfectly. I haven't tested it with the various addons out there except for my own. However as it's so simple I don't think there'll be much compatability issues.
