have you made a new DSP map or are you using their factory one?
KX can be a real mind f$$k, but its worth reading their how to.
ive got 5 desktops pc's running SB audigy 2 cards with kx, which ive set up so i get 4 whaterever i want going to them stereo outputs.
i was thinking of this for my car if someone else wanted to watch a movie while i was driving the video app can be routed to output 2 and they can wear headphones, and i can still listen to my music. assuming i dont need gps
give me a run down of what you want and ill try making a simple dsp for you if you want.
the factory one is loaded with stuff you may never need like reverbs etc.
you might want to try putting a "mixer" in with RR and winamp having an input each on that