The new mouse from Razer, the RazerNaga, has it's downfalls. It makes you rebind your keys to use it. But, you don't have to. What you can do, is set your Numpad setting on the mouse, and remap the numpad! This will, along with let you avoid using the addon, will let you use your RazerNaga with any version of WoW!
1. Download and install KeyTweak.
2. Open KeyTweak. Make sure your Naga is on, set to "Numpad", and that your Numlock is on.
3. Click "Full Teach Mode" near the bottom.
4. Click "Begin Teach Mode". Then, click the button on the RazerNaga, and then your binding. Example: Your "Vanish" is bound to V. You want the "4" on your RazerNaga to Vanish. After clicking "Being Teach Mode", click the "4" on your Naga, and then the "V" on your keyboard. Repeat as many times as needed to remap your numpad.
5. After completing as needed, click "Apply" in the bottom right. It will prompt you to restart your PC.
6. After restarting your PC, your "4" (or whatever you remapped) will use your "V" keybinding (Vanish).
Enjoy!