Hi this is very easy! Go to the aplication properties and down is Controls...... manage controls.
And you add new control!
Image!!!
(sorry very large image, forum is small then in url)
Now you have to add all controls with name as Player1 (Move Left.....) Then right in player setup, set Player 2.
This is all but you have to in behavior properties set PLayer 2 (as at image)
<img src="http://www.ourupload.xf.cz/soubory/1588/detail.PNG">