Virtal numpad for Laptop + Razer 17 buttons mouse?

Hi,
I have a Dell XPS13 9630 which runs WotLK wonderfully with full details 1080p, but there is a slight problem : i love to map the 12 buttons on the thumb side of my Razer mouse to the numpad. And the XPS13 has no numpad.
So my question is : is there a virtual numpad program that i could use that would emulate a real numpad so that i can map my mouse buttons to its virtual keys?

Any answer would be very much appreciated.

Thanks!

You can buy USB-num-keypad. It is very cheap, like 2-3 packs of chips.
Also install software for your notebook. Look carefully, almost all notebooks can emulate num-keys with Fn+letter. Theese in the middle of normal keyboard.
Have a nice day.
P.S. nice mouse.