Need help on download play.

I have 2 ds's, one is with wood R4v1.14 and the other one is with mario kart. In the DS with mario kart i want to play against other Ds (the one with wood r4) through Ds download play , but is there a way to play using the ds download without having to take the R4 out? or isnt a way of doing that?

No there isn't any way to do that.