Reply to Question about Mixtrack Pro/Traktor 2 Cueing !

Hello guys,I have a little problem about the cueing mapping between Traktor 2 and my Numark Mixtrack Pro.
Indeed,I would like the "Cue" button" to be triggered on the fly,which means that I could use the "Cue" button as the "Loop In" button.So that when I press this button,a little arrow pops up under the waves viewer without stopping the song that is playing.
I know I have to go to the Controller Manager and map the "Cue" button to the "Loop In" fonction but I don't know how to assign all the properties of the "Loop In" fonction to the "Cue" button : create a little marker without stopping the song.
I need your help please !
Thanks.