How do you play 2 players on the same keyboard?

[Nightwing]

I have no interest in using Xbox 360 controllers at the moment, I'm just interested in knowing if it is possible to play local 2 players using the same keyboard, different keys. Thanks!

[Raistin Kane]

The default game key are actually already set to two player on the same keyboard.
Player 1 by default use wasd and other keys near it.
Player 2 use the arrow key and the num pad.

[Nightwing]

What if in my case, my laptop does not have a number pad, is there any way to set new keys?

[Raistin Kane]

All the key are customizable in the option.
In fact, the game do not let you get out from the option if you don't set key for all the control for both player.
But I think you're running into a problem.
In some menu (like the character selection menu) the game force you to use default key (confirm/cancel).
Being G/J for player 1 and num pad 4/6 for player 2.
The confirm/cancel cannot be mapped to other key, what mean that you cannot use your laptop for 2 player play.
Sorry.
I can't barely imagine two people using the same keyboard at the same time being comfortable, even less for a laptop one.(no offense)