'94 Cutlass Supreme 6 speakers?

Hey,
I have a 1994 Cutlass Supreme SL with 6 speakers, but my current stereo (Kenwood MP-238) only has a 4 speaker option. Is there anyway I can use the other 2 speakers with this stereo?

Thanks,
Mike

The only thing i can think of is just splice into the wires for the two front speakers, and extend them to your other set of speakers, if they are in the front, I'm not too sure if it'll give you any trouble or put a strain on your system, but honestly i think it should work out, granted you have some general knowledge on wiring...properly

good luck, hope it helps